À l’ère du numérique, internet est devenu le moyen de communication préféré et l’espace d’échange privilégié des internautes, notamment les jeunes (Réseaux sociaux, forums de discussion, chats, courriers électroniques, blogs, etc.). De ce fait, l’objectif de cette recherche est de voir comment des pratiques langagières possédant leurs propres mécanismes scripturaux, leurs références et leurs réseaux de contraintes deviennent un moyen d’expression identitaire. En associant concepts théoriques et principes méthodologiques, le présent ouvrage examine, d’une part, les caractéristiques spécifiques de l’écrit numérique à travers l’analyse lexicale des messages extraits d’un forum de discussion et, d’autre part, les représentations des internautes vis-à-vis de la pratique de l’alternance codique dans la communication en ligne. Aussi, nous pointons la manière dont les internautes emploient le discours métissé pour justement montrer le pouvoir de la communication hybride acquis par la double appartenance socioculturelle et identitaire.

New receiver designs have been proposed to boost the heat transfer rate in the parabolic trough receiver (PTR) absorber tube, which can further improve the overall performances of the parabolic trough module. The objective of this study is to investigate the thermal performance and heat losses of the newly designed PTR wavy tube by means of a 1-D thermal model taking into account the change of the kinetic energy and pressure drop, and establishing a comparison with the conventional straight and smooth PTR absorber tube. According to the final results, the use of the S-curved absorber leads to higher thermal performance and simultaneously to lower heat losses. According to the thermal efficiency results, it is found an increase of 0.16% in the case of 450 K of the heat transfer fluid (HTF) inlet temperature and a straight length of 7.8 m of the receiver, while the heat losses decrease by a maximum of 7.72%.

Examines the market for wireless sensor networks in the era and expansion of the Internet of Things. Over the past decade, the fast expansion of the Internet of Things (IoT) paradigm and wireless communication technologies has raised many scientific and engineering challenges that call for ingenious research efforts from both academia and industry. The IoT paradigm now covers several technologies beyond RFID and wireless sensor networks (WSNs). In fact, the number of potential application fields has already exceeded expectations. According to Cisco IBSG, more than 50 billion devices are expected to be connected to the Internet by 2020, with around 20 percent from the industry sector. Therefore, integrating the IoT concept and industrial WSNs (IWSNs) is an attractive choice for industrial processes, which may optimize operational efficiency, automation, maintenance, and rationalization. Moreover, IoT ensures large-scale interconnection between machines, computers, and people, enabling intelligent industrial operations. This emergent technological evolution has led to what has become the Industrial IoT (IIoT). IIoT will bring promising opportunities, along with new challenges.

In this paper we have developed an algorithm of boron diffusion after thermal annealing in a highly doped polysilicon film. This algorithm takes into account electrically active point defects by associating some parameters such as boron solubility limit and diffusion coefficient. We have studied effect of annealing temperature in order to perform impact of this parameter on maximum depth diffusion of junction and maximum of concentration by analysis of Secondary Ion Mass Spectrometry (SIMS) profiles. In fact we have proposed numerical model based on Fick’s equation, resolved by finite difference method under Matlab also we have simulated this phenomenon by Silvaco software.