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In this paper, we propose a predictive method to construct regular column-weight-three LDPC codes with girth g = 8 so that their Tanner graphs contain a minimum number of small trapping sets. Our construction is based on improvements of the Progressive Edge-Growth (PEG) algorithm. We first show how to detect the smallest trapping sets (5; 3) and (6; 4) in(More)
In this paper, we present an improvement of the PEG algorithm for constructing quasi-cyclic low-density parity-check (QC-LDPC) codes with large girth. We introduce the concept of PEG-undetectable cycles on the computation tree in the PEG algorithm for QC-LDPC codes and give a predictive method to avoid these undetected cycles. The aim is to select only the(More)
In parallel to the using of resources implemented for distance learning, learners appreciate send and receive SMS. Although 4G offers very high data rates and adaptable quality of service, it does not support the SMS legacy service of GSM. 3GPP is currently specifying two architectures for SMS transmission: SMS over SGs, and SMS over IMS. However, when the(More)
In this paper, we consider the influence maximization problem in social networks. The aim is to find a subset of k -- nodes called seeds, which maximizes the influence spread. We propose a new approach based on the Independent Cascade Model (ICM) which extracts an acyclic spanning graph from the social network. The extraction method used to build the(More)
In this paper, we propose an optimal assessment of internal control impact on banking risks by making automatic the residual risk estimation step of FMECA which is based on an inductive reasoning to study causes, effects of failures and their criticality. For this we defined three equations based on maturity and type of controls then we have obtain a(More)
In this paper, strategies and appropriate Reconfigurable Optical Add Drop Multiplexer (ROADM) network architectures for universal access have been investigated. Universal access is a challenge for every country, government and in particular developing countries. One of the big issues is the lack of sufficient funds to support the deployment. Advantages in(More)
In this paper, we propose a solution to reduce the dropout rate of students of distance learning platforms, while improving social contact between users. This solution consists of the design and development of a middleware application and a BigBlueButton Moodle plugin allowing access to social networks such as Facebook / Twitter to share information in a(More)
This paper presents a collaborative software development platform allowing traditional and virtual universities actors who are geographically distant to work on a software development project using common (usual) programming languages. In the context of the virtual universities operating in the field of STEM (Science, Technology, Engineering and(More)