This study looked at global comfort in a classroom in a tropical climate. Based on surveys and in situ data collection, the hierarchical multi-criteria analysis method was used to establish a model of the global comfort indicator. The weights obtained for each of the comfort components truly reflect the needs in terms of global comfort in a classroom in a tropical climate, with a high level of hygrothermal comfort, a high level of visual comfort and acoustic comfort, and a low level of olfactory comfort. The global comfort index for classrooms in a tropical climate, I_GSC, has been established and will be used as a tool for predicting global comfort in classrooms.

Cassava production in Benin is estimated at more than 4,5 million tonnes in 2018. Most of this production is for self-consumption and post-processing marketing. The actors in this sector transform fresh cassava into several other products (gari, tapioka, atièkè, lafun, cossette, flour breadmaking...), recognized worldwide and particularly in Africa. From an artisanal processing, the transformers in this sector, have gone through a semi-industrial transformation, thanks to the mechanization of some painful operations that used to consume a lot of time during processing. My job, was to study and design a machine that can peel cassava. This peeling operation was previously done manually using a knife or special manual tools (peelers...) and associated with a significant consumption of working time and the risk of injury and loss. The present machine, must allow the improvement of the safety, the quality of the operation as well as the significant reduction of the duration of execution. It will consist of a wooden drum whose interior is lined with wire brush fibers, driven by a motor (electric or thermal) or by the operator with a pedal, if any.