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This concept paper describes a device consisting of a disinfectant wristband for the hands of the wearer and objects that the wearer intends to touch. This wristband can be powered automatically by the movement of the user’s hand or by solar cells or, if necessary, by a power outlet. It disinfects the surface of the hands and the objects in front of them using an ultraviolet (UV) lamp. Control and monitoring can be carried out automatically or manually, which guarantees complete and effective disinfection. The electronic control system, which is fully integrated into the UV emitter head, regulates the intensity and duration of the UV radiation and also manages the electrical energy. In addition, the wristband can be fitted with an optional watch to improve its decoration and ergonomics. The device in question has a compact, elegant, and practical shape. This hand sanitizing wristband can be an effective tool in the fight against the current COVID-19 pandemic and, in general, help to address the health challenges related to hygiene and disease prevention.

This paper presents a novel automated drone system designed for the efficient cleaning of solar panels. The drone, equipped with three rotors and advanced detection sensors, autonomously identifies the precise positioning of solar panels and activates an integrated cleaning mechanism comprising four rotating brushes (two vertical and two horizontal). The inclusion of a tilt mechanism in the two front propellers ensures automatic adjustment of the propeller axes, enhancing precise control of the drone’s movements during cleaning phases. Complemented by a robotic component featuring a water reservoir and a precision-spraying system, the entire system dynamically regulates water pressure, flow rates, and distribution based on the real-time conditions of the solar panels, thereby optimizing the cleaning process. Powered by solar energy, the system offers an autonomous and economically viable solution, mitigating the necessity for frequent recharging. This advanced technology not only enhances the energy efficiency of solar panels but also extends their operational lifespan. Consequently, the proposed system contributes significantly to the creation of a more dependable and sustainable solar-energy production infrastructure, simultaneously promoting environmentally responsible practices through efficient water utilization.

The COVID-19 outbreak is a sharp reminder that pandemics, like other rarely occurring catastrophes, have happened in the past and will continue to happen in the future. It is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is an emerging disease. There has been a rapid increase in cases and deaths since it was identified in Wuhan, China. Even if we cannot prevent dangerous viruses from emerging, we should prepare to dampen their effects on society. The current outbreak has had severe economic consequences across the globe, and it does not look like any country will be unaffected. This not only has consequences for the economy; all of society is affected, which has led to dramatic changes in how businesses act and consumers behave. It is in this context that this paper describes a device based on a mechanical spray disinfection system that does not use an electrical source or detection sensor, thus facilitating the use of this system by anyone. The disinfection process is launched automatically by the movement of a door, which changes the position of a piston, triggering the spraying of a disinfectant liquid. This door-controlled automatic decontamination system could be an effective tool in the fight against the current COVID-19 pandemic and, in general, could help to address the health challenges related to hygiene and disease prevention at low cost.

This technical note describes the preliminary design of a simple, easy-to-use, and easy-to-build ventilator with an unique design that can be used for COVID-19 patients in emergencies and to prevent massive loss of life in resource-poor environments. It can be assembled by a nonexpert as a homemade solution, without the need for specific equipment or technology. The proposed system is novel, inexpensive, has a reduced reliance on external power, and is very easy to maintain.

The paper presents the improved design of an integrated bifacial solar panel that converts solar radiation efficiently into electrical energy with cooling system. This panel consists of a parabolic bifacial photovoltaic (PV) cell which can convert incident sunlight to electrical energy from both sides of the cell in order to produce more electrical energy. The material that passes through tubes is used to cool the photovoltaic device, as well as, it should be transparent to let the solar ray pass through the reflection mirrors and reflect it in the backside of the panel. The proposed concept aims at increasing the energy conversion efficiency by absorbing the maximum of radiation and cooling the PV cells. It should be mentioned that the proposed concept is registered as patent application at Office marocain de la propriété industrielle et commerciale under the following number: MA 42181.