Accumulation of dust on the surface of solar panels distract the light from reaching solar cells. This leads to significant degradation in the performance of solar panels in terms of output power. In this paper, we present a simple and low cost cleaning system to mitigate the effect of dust on the performance of solar panels. The mechanical as well as the electrical subsystems are described, an algorithm for controlling the cleaning mechanism is proposed. Results show that the cleaning system allows the solar panel to provide regular power output.

Security is one of the most important issues concerning Vehicular Ad-Hoc Networks (VANETS), specifically when dealing with misbehaving vehicles to prevent them threatening the safety of others. In this paper, we present a review about revoking misbehaving vehicles based on classical Certificate Revocation List (CRL) in IEEE Standard. The main disadvantage of these algorithms resides in the fact that the Certification Authority (CA) is overwhelmed because it is responsible to distribute the whole CRL to all the requesting vehicles. To overcome this drawback in European Telecommunication Standards Institute (ETSI) standard, we propose our contribution that aims to minimize the tasks of the CA, by decomposing the CRL into different chunks that are distributed separately by the different RSUs of the same zone.

The Islamic University of Lebanon (IUL) is committed to providing faith and knowledge as a source of inspiration for the Lebanese nation, citizen, state and society as a whole. IUL has paid special attention to the environment and to the green metrics when establishing the new campus in Wardanieh, the rules related to green buildings and the preservation of the environment were taken into account. The COVID-19 pandemic has created the largest disruption of education systems in human history, affecting nearly 1.6 billion learners in more than 200 countries. In this paper we will describe how the setting and infrastructure of Wardanieh campus has helped in managing the Covid-19 crisis at the university through different levels: the physical distancing, the effect of the large campus buildings area according to the campus population, moreover the large forest spaces, the natural ventilation of buildings, the sanitization and sterilization procedures with setting guidelines for Covid-19 such as the obligation of wearing masks. Furthermore, we will describe the influence of ICT technologies into education in many different ways for distance learning, and how the university has evolved its ICT infrastructure to support the increase in demand on the internet capacity and on university servers. Keyword: IUL university, Green, SDGs, Covid-19 prevention, education, settings and infrastructure