The Republic of Guinea, like other intertropical countries, receives significant levels of global solar irradiance. However, accurate quantification of local solar energy potential is essential for its optimal utilization. In this study, the solar energy potential of the City of Mamou (Republic of Guinea) was assessed using three methods for acquiring global solar irradiance: In-situ measurements using a solarimeter (VICI Ix-107) and a pyranometer (BGT-HJX-TF), an empirical mathematical model, and satellite-based data obtained from the NASA POWER platform. The results indicated that the empirical model substantially overestimated global solar irradiance and failed to adequately capture seasonal variations. In contrast, the in-situ measurements obtained with the pyranometer showed a strong correlation with the NASA POWER data (R = 0.97). The linear regression model established between the...

Les effluents des stations d'épuration contiennent des polluants organiques, inorganiques et microbiens, représentant une source majeure de contamination des eaux et des sols. Ce travail vise à étudier le biotraitement des eaux usées en vue d’éliminer le bisphénol A (BPA), la demande chimique en oxygène (DCO), l’ammonium (NH4+) et les ortho-phosphates (PO43-). A cet effet, les bioréacteurs à membrane (BRM) ont été utilisés en raison de leur capacité à éliminer simultanément divers polluants en une seule étape. Une eau usée synthétique a été préparée pour l’application des bioréacteurs à membrane en vue d’éliminer les micropolluants réfractaires. Les résultats expérimentaux ont montré une réduction significative des micropolluants tels que 98% du BPA, 99% de la DCO, 100% de NH4+ et 74% de PO43-. La membrane a contribué également à éliminer les matières en suspension confirmant l'efficaci...

In our work, we are attempting to predict urban traffic congestion in order to address issues related to urban mobility. We believe that congestion situations have upstream causes that significantly impact urban traffic flow. Thus, to resolve the problem of traffic congestion, there are intermediate steps that allow us to understand the traffic process. First, it is crucial to fully comprehend the impact that traffic light duration has on road traffic. Secondly, we consider it equally important to understand the effect that road infrastructure design has on traffic congestion. For instance, on a given road, objects such as traffic signs, parking arrangements, and lane structures influence traffic flow. Finally, we examine the impact of meteorological factors on traffic congestion. The meteorological factors considered in our analysis include rain, wind, and visibility.

Senegalia macrostachya is a valuable shrub increasingly threatened in West Africa. The study aims to assess the impact of land use and biophysical factors on its population structure and diversity across Sudanian and Sudano-Sahelian climate zones in Burkina Faso. A total of 201 plots were sampled in three land use categories: farmlands, fallows and protected areas. In each plot, topographic variability, soil texture, woody species diversity and size of morphological traits of S. macrostachya were recorded. A significant difference (p < 0.0001) was found in woody species richness between climate zones and land use, with higher diversity in protected areas, as indicated by higher Hill index values. Population density of S. macrostachya was significantly higher in the Sudanian zone (245.06 ± 217.63 individuals/ha) than in the Sudano-Sahelian one (132.70 ± 96.03 individuals/ha). Density was...

Les études portant sur les violences faites aux enfants sont nécessaires pour accélérer les progrès vers la prévention de cette pratique néfaste. Cette étude examine l’influence des attitudes personnelles des enfants et des normes communautaires perçues concernant la punition verbale et corporelle sur les violences subies par les enfants au Burkina Faso. L’analyse repose sur un échantillon représentatif de 5 504 enfants âgés de 12 à 17 ans, issu d’une enquête nationale réalisée entre mars et juin 2018 par l’Institut Supérieur des Sciences de la Population (ISSP) dans les 13 régions du pays. Les résultats révèlent que l’acceptation de la punition verbale parentale ainsi que la perception par les enfants d’une tolérance communautaire envers la punition corporelle sont positivement associées à une exposition accrue aux violences faites aux enfants durant l’année écoulée. Ces résultats souli...

Sweet grain sorghum is exploited in Burkina Faso through the consumption of fresh grains early at the doughy stage. To identify, valorise and conserve the genetic diversity of this agricultural resource, SNPs markers are essential tools. The aim of the present study is to assess the genetic diversity of sweet grain sorghum expressed in a linear DNA sequence, and to identify SNPs. To this effect, 50 sweet grain sorghum genotypes were sequenced using DArTseq genotyping platform. The results identified 4610 polymorphic loci with a major allele frequency ≤ 95%. The SNPs identified are made up of 55.23% transitions and 44.77% transversions with an average polymorphism information content of 0.26. The expected heterozygosity value He of 0.18 shows moderate genetic diversity in sweet sorghum in Burkina Faso. The results of the PCoA and AMOVA analyses revealed that genetic diversity is more clos...

Earth, an abundant and ancient material, has been used in construction for millennia. It allows for the creation of diverse dwellings, ranging from simple houses to monumental buildings. However, despite its numerous advantages, earthen construction, particularly through Compressed Earth Blocks (CEBs), is less common than imported materials. These imported materials often fail to meet the demands of climate change, stability, and durability. In Burkina Faso, this phenomenon is particularly pronounced in Ouagadougou, the capital, where earthen architecture is often associated with the image of poor and low-quality housing. Construction represents a strategic sector for economic development, but it remains heavily dependent on expensive and energy-intensive imported materials. Compressed Earth Blocks (CEBs), made from abundant local materials, appear as a sustainable alternative. This stud...

Les ateliers de philosophie avec les enfants sont perçus comme favorisant certains apprentissages dont le vivre-ensemble, considéré par l’UNESCO comme une mission éducative fondamentale. La pratique régulière des ateliers, à travers les interactions, permet aux enfants d’apprendre à penser leur rapport aux autres et au monde. Ce présupposé nous a conduit à nous demander en quoi ces espaces de débat et de réflexion contribuent au développement du sens d’un mieux vivre-ensemble. Par une démarche théorique, basée sur l’état de l’art, la présente communication démontre que les compétences développées par la pratique des ateliers sont pertinentes et variées. Selon les visées ou courants, les ateliers de philosophie sont des instances d’auto-régulation où l’enfant apprend à suspendre son « je » pour faire place progressivement au « nous ». En cultivant l’écoute, l’attention à l’autre, la tolér...

In Burkina Faso, livestock is the second most important sub-sector of agriculture after crop production, contributing significantly to the national GDP and supporting over 80% of households. Live animal trade dominates livestock trading and plays a central role in regional commerce. Livestock markets constitute key hubs for trade, information exchange, and income generation, particularly in Ouagadougou, the country’s main consumption and trading center. To characterize stakeholders, a total of eighty (80) actors were involved in a survey conducted across three livestock markets in Ouagadougou. Most respondents were male (81.20%), reflecting the gender imbalance commonly observed in livestock marketing activities. More than 3/4 of the respondents had over twenty-five years of experience. Livestock sellers represented the dominant group (63.75%), followed by brokers (23.75%) and buyers (12...

Pearl millet (Pennisetum glaucum (L.) R. Br.) is an important crop for populations in arid and semi-arid areas of Africa and India. In Burkina Faso, pearl millet is one of main cereal crops, well known for climate resilient features and nutritional transcendency. However, most cultivated genotypes are landraces, whose productivity is still low. The objective of this study was to characterise the diversity of landraces for morphological traits under field conditions in Burkina Faso. Seventy-two accessions from Burkina Faso (24), India (24) and Togo (24) were evaluated in 2021 and repeated in 2022 at the Gampela station in Burkina Faso. The results revealed a diversity of accessions on grain and collar colours. This variability exists between the accessions on grain shape, ears pubescence and stay green. There is a marked difference between landraces from India landraces, compared to those...