Mohamed Tayeb Laskri

Mohamed Tayeb Laskri
Badji Mokhtar - Annaba University | UBMA · Département d'informatique

Professeur des Universités

About

137
Publications
24,689
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Introduction
Mohamed Tayeb Laskri obtained a 3rd cycle doctorate on computer science (France, 1987). He obtained his PhD degree from the Annaba University (Algeria, 1995). Now, he is a Full Professor at University of Annaba, where Its research takes the reasoning in artificial intelligence like field of application privileged in particular in the image processing, the multi-agents systems, the engineering of the Human-machine interfaces and the Natural Language Processing.
Additional affiliations
March 1987 - present
Badji Mokhtar - Annaba University
Position
  • Research Director

Publications

Publications (137)
Chapter
In this paper, we propose a new sensing strategy for object detection and tracking based on, first, the extraction of visual information of a frame image such as a discrete object, specifically: edges. At this level, we focus on the description of light field images based on the detection and the localization of significant intensity variation, or...
Chapter
Digital fundus imaging is becoming an important task in computer-aided diagnosis and has gained an important position in the digital medical imaging domain. One of its applications is the retinal blood vessels extracting. Object detection in machine vision and image processing has gained increasing interest due to its social and security potential....
Conference Paper
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in this paper, we present a corpus linguistics based approach applied to analyzing digitized classical multilingual novels and narrative texts, from a semantic point of view. Digitized novels such as “the hobbit (Tolkien J. R. R., 1937)” and “the hound of the Baskervilles(Doyle A. C. 1901-1902)”, which were widely translated to dozens of languages,...
Article
Purpose: The aim of this article is to discuss the impact of static load balancing over a set of heterogeneous processors, where tasks are independent and unitary in static environments, by showing how to distribute task in order to optimize both the average response time and the degree of the resources used. Methods Implementation of a modified s...
Conference Paper
Knowledge management has become a strategic and vital issue for many companies in order to respond to an economic, technical and informational environment which evolves dynamically. The knowledge loss risk has led companies to look for a way to capitalize them for later reuse. The goal of knowledge capitalization, in an organization, is to favor th...
Article
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In this paper, we describe a Frame Semantics based computational approach for Arabic language processing. We explore the representational of Frame Semantics approach to Arabic text semantics, the adaptability of Berkeley FrameNet database and the transferability of FrameNet tools for Arabic, a language that differ typologically from English. We des...
Article
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Many natural language processing areas use semantic roles in order to improve the applications of the extracted information, the question answering and the machine translation, etc. In Arabic, the work of constructing the semantic role labeling system or the annotated corpus is extremely limited compared to their speaker’s number and to English lan...
Conference Paper
Since about twenty years, the otoneurology functional exploration possesses auditory tool to analyze objectively the state of the nervous conduction of additive pathway. In this paper, we present a new classification approach based on the Hidden Markov Models (HMM) which used to design a Computer aided medical diagnostic (CAMD) tool that asserts au...
Article
The vacuum cleaner robot requires the artificial intelligence to solve the problem of sweeping of the entire environment areas taking into account some factors such as the time and the length of the generated path. This task is known as the complete region coverage navigation (CRCN). In this paper, to resolve the problem of CRCN in a room environme...
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This paper describes the design and implementation of a computational model for Arabic natural language semantics, a semantic parser for capturing the deep semantic representation of Arabic text. The parser represents a major part of an Interlingua-based machine translation system for translating Arabic text into Sign Language. The parser follows a...
Article
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The vacuum cleaner robot should have a mechanism such as the artificial intelligence to solve the problem of cleaning the entire environment areas taking into account some factors such as the number of turns and the length of the trajectory. This robot’s mechanism or task is known as the path planning of coverage region (PPCR). In this paper, to re...
Article
In this paper, we discuss cooperative approach to solve the problem of navigation for autonomous mobile robots in fully dynamic environments, it is about building an environment of robotics specific to a construction site where such robots must cooperate to deal with the functions related to the site. For that, we used the power of the biological i...
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The aim of this paper is to present an open software platform for analysing texts in standard Arabic language. The originality of this platform is that it is an integrated software environment which offers all the necessary resources and tools for parsing Arabic texts. For formalising the several elements of the language, the HPSG formalism has bee...
Conference Paper
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This article investigates the vector quantization approach applied to speaker identification (SID) in two languages Arabic and French. We expect to recognize speaker even whether the training process was done only in one language and the test is achieved with another different language. The database used is created with one hundred speakers in Arab...
Article
A number of adaptive e-learning hypermedia systems (AEHS) have been developed to support learning styles as a source for adaptation. However, these systems suffer from several problems, namely: lack of maintenance adaptation to learning style, less attention was paid to thinking styles and the insertion of specific teaching strategies into learning...
Article
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Mobile applications require an adaptation phase to adapt to the user's and application context. Utility functions or rules are most often used to make the adaptation planning or decision, i.e. select the most adapted variant for each required service. Fuzzy controllers are used when it is difficult or even impossible to construct precise mathematic...
Conference Paper
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This paper explores the use of mismatch condition in speaker variability applied to Automatic Speaker Verification (ASV) defined as a classification task to decide whether a proclaimed identity is true or not. This paper proposes to model mismatch conditions in speaker variability from session to another. It was shown that the speaker recognition a...
Conference Paper
The robot applications can be found in many activities. It is a field of research that exists for a long time, however, many research work deal with several problems, the co- operation in robotics remain always a current problem because of its complexity in term of time, calculation, the mechanism of synchronization and the distribution of the role...
Article
In this paper a decision support system for the diagnosis of a very serious respiratory disease caused by tobacco named the chronic obstructive pulmonary disease is presented. The system is based on case-based reasoning principles and gathers the experience of experts of the pneumology department of Dorban Hospital (Annaba, Algeria). A critical iss...
Article
Support vector machines (SVMs) have shown superior performance compared to other machine learning techniques, especially in classification problems. Yet one limitation is the long computational training time which increases with the data size. This problem has been investigated thoroughly and different algorithms for classification have been used w...
Article
Recent years have shown increasing awareness for the importance of adaptivity in e-learning. Since the learning style of each learner is different. Adaptive e-learning hypermedia system AEHS must fit different learner's needs. A number of AEHS have been developed to support learning styles as a source for adaptation. However, these systems suffer f...
Article
An Adaptive E-learning Hypermedia System AEHS is an approach whose target is to personalize the learner's learning experience. A number of AEHS have been developed to support thinking styles as a source for adaptation. However, these systems suffer from several problems, namely: lack of maintenance adaptation to thinking style and the insertion of...
Conference Paper
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In this paper, we present an ongoing effort in lexical semantic analysis and annotation of Modern Standard Arabic text, a semi automatic annotation tool concerned with the morphologic, syntactic, and semantic levels of description. Annotation outputs are available in XML format compatible with the FrameNet project design.
Article
Most approaches to adaptive hypermedia were based around acquiring and representing learner's knowledge. While this is crucial for user modelling in general adaptive hypermedia, it is very limited for e-learning because it does not address the far more fundamental problem which is;learners learn in different ways, different learning styles and diff...
Article
A distinct feature of an adaptive e-learning hypermedia system (AEHS) is the learner model it employs, that is, a representation of information about an individual learner. Learner modeling and adaptation are strongly correlated, in the sense that the amount and nature of the information represented in the learner model depend largely on the kind o...
Article
Automatic speaker verification (ASV) is a binary classification task. It consists of accepting or rejecting the claimed identity. ASV system has to decide whether a claimed speaker uttered a sentence. This paper proposes an algorithm called impostor random vector quantisation (IRVQ) based on multiples random codebook. IRVQ represents the impostor m...
Article
Full-text available
Context-aware applications require an adaptation phase to adapt to the user context. Utility functions or rules are most often used to make the adaptation planning or decision. In context-aware service based applications, context and Quality of Service (QoS) parameters should be compared to make adaptation decision. This comparison makes it difficu...
Article
The Web allows self-navigated education through interaction with large amounts of Web resources. While enjoying the flexibility of Web tools, authors may suffer from research and filtering Web resources, when they face various resources formats and complex structures. An adaptation of extracted Web resources must be assured by authors, to give reli...
Article
The geographic data use through Web Services shows the Geospatial Web Services (GWS). A growing number of GWS designed to interoperate spatial information over the network have emerged. GWS are changing the way in which spatial information systems and applications are designed, developed, and deployed. When GWS is increasing, the difficulty of the...
Article
Full-text available
Le formalisme HPSG connaît depuis plusieurs années un essor remarquable dans le domaine du TALN en général, et l’analyse de la syntaxe en particulier. Nous travaillons sur le formalisme HPSG sur le double aspect modélisation/implémentation en vue de son application sur l’arabe standard. Dans cet article, nous présentons les récents développements d...
Conference Paper
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Speaker Verification (ASV) is a binary classification task to decide whether a claimed speaker uttered sentences. This paper proposes two different algorithms for vector quantization (VQ) to speaker verification. The first algorithm named Partial Vector Quantization (Partial VQ) is based on partitioning acoustics space, represents the impostors cal...
Conference Paper
Case-Based Reasoning (CBR) is a technique which consists of learning from past experiences. Its use is very interest in domains where experience plays an important role in the resolution of new problems, which is the case in medical diagnosis. This paper presents a decision making support system based on CBR and applied to the diagnosis of Chronic...
Article
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In this paper, we present a work consisting of conceiving and realizing a decision making support system for the clinical decision. Being based on Case-Based Reasoning (CBR) the system will highlight the impact of this technique in the clinical decision making domain. The experience has its importance in medicine, and the nature of CBR has motivate...
Conference Paper
In this paper, a three-dimensional computerized facial reconstruction method from three-dimensional Magnetic Resonance Image (3D-MRI) of human heads is presented. It based on a model deformable approach constrained by the knowledge of soft tissues thicknesses, at a certain number of characteristic landmarks. The facial reconstruction process is div...
Article
Full-text available
The performance of speaker verification system degrades when the test segments are utterances of short duration, therefore, we investigate the use of model representing our target speaker with his close speaker and his own speech data. We propose to create a new Speaker Model who groups close speakers (CS) achieved with two clustering algorithms in...
Conference Paper
The evolution of new communication and information technologies led to a very high rate of innovation in online education. This opens doors for several major research projects at universities, institutes and research centers, all over the world. The content of training courses and quality are two key points presented in each E-learning platform sys...
Conference Paper
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This article investigates several technique based on vector quantization (VQ) and maximum a posteriori adaptation (MAP) in Automatic Speaker Verification ASV. We propose to create multiple codebooks of Universal Background Model UBM by Vector Quantization and compare them with traditional approach in VQ, MAP adaptation and Gaussian Mixture Models.
Article
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We aim to describe different approaches for vector quantization in Automatic Speaker Verification. We designed our novel architecture based on multiples codebook representing the speakers and the impostor model called universal background model and compared it to another vector quantization approach used for reducing training data. We compared our...
Conference Paper
Full-text available
in this paper we present a virtual reality based visual tool in order to generate 3D gesture entity performed by three-dimensional (3-d) humanoid (avatars) compliant with HAnim 2.0 in VRML/X3D-based environments. We propose a new open and flexible representation of the gestural entities transcriptions under reuse XML format. This work represents th...
Article
This work falls within the framework of natural language processing. Our goal is to develop a machine translation system from Arabic to any target language using a purely linguistic method as a key to get insights into the standard layer-based structure of linguistic phenomena (morphology, syntax and semantics) as well as in recognizing the interac...
Article
Accessing the massive amount of information posted daily to the web is becoming a challenge. The need for tools to exploit information from such content in a robust and rapid manner is greater than ever. Ontology could be an efficient alternative for searching and exploiting information on the web. The main advantage of ontology is that it provides...
Conference Paper
The main goal of this paper is to compare the performance which can be achieved by three different approaches analyzing their applications’ potentiality on real world paradigms. We compare the performance obtained with (1) Discrete Hidden Markov Models (HMM) (2) Hybrid HMM/MLP system using a Multi Layer-Perceptron (MLP) to estimate the HMM emission...
Article
The evolution of information and communication technology has made a very powerful support for the improvement of online learning platforms in creation of courses. This paper presents a study that attempts to explore new web architecture for creating an adaptive online learning system to profiles of learners, using the Web as a source for the autom...
Article
Full-text available
This article discusses the theory of psycho-educational criteria of the learner as a means of hypermedia educational system adaptation. To measure learning preferences, several adaptive systems take into account individual differences particularly, the "learning style" and "style of thought". These concepts refer to a set of pipes and strategies on...
Article
Semantic relatedness measures have proven useful for a number of applications, such as querying personalized web resources, word sense disambiguation, or real-word spelling error correction. Most semantic relatedness measures between concepts are based on the concept hierarchy of a domain ontology. In this article, we propose a semantic relevance (...
Article
Full-text available
The main goal of this paper is to compare the performance which can be achieved by five different approaches analyzing their applications' potentiality on real world paradigms. We compare the performance obtained with (1) Multi-network RBF/LVQ structure (2) Discrete Hidden Markov Models (HMM) (3) Hybrid HMM/MLP system using a Multi Layer- Perceptro...
Conference Paper
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La représentation des connaissances est l'un des problèmes de l'Intel-ligence Artificielle. Dans cet article, nous abordons le problème de la représen-tation des connaissances linguistiques transportées dans la langue naturelle et leur transfert vers un formalisme de représentation spatiale en vue d’une con-version des énoncés textuels vers des éno...
Article
Full-text available
In this paper we propose to investigate statistical language models for Arabic. First, several experiments using different smoothing techniques are carried out on a small corpus extracted from a daily newspaper. The sparseness of the data leads us to investigate other solutions without increasing the size of the corpus. A word segmentation techniqu...
Conference Paper
Full-text available
Information extraction (IE) from corpora is texts analysis in order to extract structured information such as Named Entities (NE) which may be names of person, organization, address, date, location etc. ... GATE is a software toolkit written in Java from 1995 and widely used worldwide by many communities (scientists, companies, teachers, students)...
Article
This article discusses learning style as an adaptive criterion of an educational hypermedia system. Our approach is based on the measuring of the performance of a learner in an objective learning designed according to the characteristics proposed by Felder, to describe the learning style of a learner. If the learner's performance is satisfactory, t...
Article
The aim of facial reconstruction is to estimate the face of an unknown individual from the shape of his/her skull to aid in recognition and identification. In this paper a 3D computerized facial reconstruction method from 3D-MRI of human heads is presented. It based on a model deformable approach constrained by the knowledge of soft tissues thickne...
Conference Paper
The field of education has always been closely connected with information and communication technologies (ICT). Currently, we perceive that digital and network technologies increase in their importance where the Web plays a central role. In an application of online learning, Web is used as representative supports for producing, managing and distrib...
Conference Paper
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Cet article propose un système de génération automatique des énoncés en Langue des Signes Algérienne (LSA) à partir de texte écrit en arabe standard. Les entités gestuelles générées seront exécutées par un personnage de synthèse 3D (Avatar) en respectant les caractéristiques linguistiques propres aux langues des signes. Le contenu sémantique de la...
Article
Full-text available
The use of geographic data through Web services shows the geospatial Web Services (GWS). A growing number of GWS designed to interoperate spatial information over the network have emerged. GWS are changing the way in which spatial information systems and applications are designed, developed, and deployed [1]. When GWS is increasing, the difficulty...
Book
Adaptive learning support for learners becomes very important in the context of increasing re-use of resources from heterogeneous and distributed learning repositories. This chapter presents OrPAF, an Adaptive Educational Hypermedia (AEHS) and web-based System which integrates semantic web models and technologies in order to achieve interoperabilit...
Chapter
Adaptive learning support for learners becomes very important in the context of increasing re-use of resources from heterogeneous and distributed learning repositories. This paper presents OrPAF, an Adaptive Educational Hypermedia (AEHS) and web-based System which integrates semantic web models and technologies in order to achieve interoperability...
Conference Paper
Full-text available
In this paper, we propose a comparative s tudy of statistical language models of Arabic and F rench. The objective of this study is to understand how to bet ter model both Arabic and French. Several experiments using different smoothing techniques have been carr ied out. For French, trigram models are most appropriate whatever the smoothing techniq...
Article
Full-text available
Geographical information has became very expensive and important in our daily life. Its importance lies on its existence in the majority of the human activities through their localizations in geographical space; it is also very useful to refine certain queries. It is not astonishing that most of the documents on the Web contain space references thr...
Article
Full-text available
In this work we propose to investigate statistical language models for Arabic. Several experiments using different smoothing techniques have been carried out on a small corpus extracted from a daily newspaper. The sparseness data conducts us to investigate other solutions without increasing the size of the corpus. A word segmentation has been opera...
Article
The documentary information retrieval interest more and more and often resorts to various tools of formalization and representation, which taken independently do not lead to the anticipated results. Without aiming at exhaustiveness, our study combining the ontology and Petri nets, and to try to release some promising tracks in this domain, but whic...
Conference Paper
Full-text available
We propose a new approach in Automatic speaker verification ASV based on detection Gender (male,female). We determine with speaker voice his gender. knowing that ,the speaker could be an impostor with opposite gender that he claims. The aim of this work is to experiment if detection gender module can improve speaker verification decision when we co...
Article
Adaptive learning support for learners becomes very important in the context of increasing re-use of resources from heterogeneous and distributed learning repositories. This paper presents OrPAF, an Adaptive Educational Hypermedia (AEHS) and web-based System which integrates semantic web models and technologies in order to achieve interoperability...
Article
Full-text available
This paper presents a 3D computerized facial reconstruction method based on recent techniques of medical imaging. It is based on a reference 3D image from which skull and skin are extracted, and an image of the skull of the unknown head for which the skin should be reconstructed. The facial reconstruction is obtained by deforming the 3D image of th...
Article
This paper describes the architecture of an Interactive Learning Environment (ILE) on the Internet using companions, including a human one geographically distant from the learning site. The achieved system relies on 3-tiers Client/Server architecture (Client, Web Server, Data and applications Server) where human and software agents can communicate...
Article
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In spite of the generated benefits, Object-Oriented (OO) paradigm seems reaching its limits, regarding complexity reduction of current systems. In this context, the Aspect Oriented (AO) comes up as an alternative to reduce software development complexity while keeping OO advantages. Needs for investigating methodologies of AO Software Development h...