The choice of this theme aims at the relative interest with the object that had attracted our attention as researchers in Engineering Sciences. Indeed, it all started with an exchange and observation of the judicial sentencing process in the Democratic Republic of Congo (DRC), so we were driven by the desire to improve this process to allow an optimal management and a smooth running of the judicial procedure of Congolese citizens. This article will provide a possible solution in order to maximize the management of the various files and to allow the archiving of judgments for a follow-up not only of the prisoners but also of the various judges and clerks who also commit the crimes within the Ministry of Justice. In addition to the literature review, which is upstream of all the methods used, the analytical method accompanied by the Merise and UML methods helped us to achieve our objective. The results obtained in this article are those: to know the criminal records of all Congolese citizens; to make the information of each of them accessible through a shared database and access the data while eliminating the loss of files of all Congolese citizens.

A fire is a large fire that spreads causing significant damage. It is considered one of the disasters that affects public infrastructure. In fact, the MLDK market in the municipality of Masina has experienced cases of fire of unidentified origin that have caused huge losses to small traders and even, caused huge expenses of rehabilitation work for the state and some pavilions have remained unrehabilitated to this day. The objective of this article is to set up a fire detection and extinguishing system equipped with networks, thermal sensors and sprinklers to prevent fires in order to protect people and their property. In addition to the literature review, which is upstream of all the methods used, this approach was based on direct observation and experimental methods supported by a field survey. The results obtained show the interest of this project on fire detection, especially in non-working hours. Automatic fire detection and extinguishing is a very complex and delicate process, which requires appropriate and efficient equipment.

Air pollution is a major public health issue worldwide, particularly in the provincial city of Kinshasa, and environmental protection has become a duty for all governments in recent years. Global warming and air pollution are the main reasons for this. Indeed, the study of air pollution aims to understand its particularities in order to limit its effects as much as possible. To achieve this goal, we will be setting up a measurement station equipped with MQ-135 sensor networks to collect useful data and send it to a remote server. In addition to the literature review that preceded all the methods used, this approach was based on the direct observation method supported by a field survey. On the one hand, the results of this study showed that the city of Kinshasa is much more affected by the nitrogen oxide pollution emitted by industry. On the other hand, since the mission of any State is to guarantee the safety of people and their property, to help the relevant State services to have adequate technical resources for permanent monitoring of the said environments, in order to combat any possible spillover of harm. We would also like to support these services in the organization of cells to combat any nuisance, and to include a heading reserved for this purpose in state taxes. These costs continue to elude the public coffers of the city of Kinshasa, representing an enormous loss of revenue for the State.