Past Issue

The effect climate variability on forage production wasstudied in november 2025 in Batha Province in Chad. About 100 questionnaires were distributed to livestock farmers and to collect informations about some climatic parameters in Batha province of Chad. The objectif was to analyse climatic parameters that affect forage production and adaptativestratégies of breeders. The results indicate an increase trend warming accross the sahel, with the hottest months sited between April and May.

Amblyopia, usually known as "lazy eye," is a childhood vision disorder resulting from impaired coordination between the brain and the eye during early visual development, leading to reduced vision in one eye. It is a universal public health concern, affecting 1-5% of the population, with higher prevalence in developing countries due to limited access to early diagnosis and treatment. Untreated amblyopia can cause permanent vision loss, impacting education and career prospects.

This study investigates the corrosion inhibition efficacy of a green-synthesized zinc acetate–reduced graphene oxide composite, prepared using aqueous Helianthus annuus (sunflower) seed extract as a reducing and stabilizing agent, for mild steel in aggressive corrosive environments. The composite was synthesized through sequential green reduction of graphene oxide in the plant extract, followed by incorporation of zinc-based nanoparticles derived from zinc acetate under alkaline conditions, yielding a black powdered material with a final mass of 1.42 g.

This Crown pillars are essential structural elements for the stability and safety of underground mines, particularly when they separate underground excavations from the surface or an adjacent open pit. At the Fekola gold mine, the transition from open-pit to underground mining of a shallowplugingorebodyled to the formation of a crown pillar with an irregularshape and steep inclination, presenting a particular geomechanical challenge. This study aims to assess the stability of thisatypical crown pillar as part of the plannedmining sequence.

This study focuses on the physico-mechanical and geotechnical properties of natural gravels and granite collected from two localities in the Kouilou Department (Congo). The research was conducted on two deposits of natural gravels, located respectively in Malélé and Boubissi, as well as on a crushed granite deposit in Louvoulou.

Independent researchers operating outside formal academic institutions frequently encounter structural barriers to scholarly participation, including limited access to peer-review channels, epistemic skepticism toward non-affiliated authors, and reduced bibliometric visibility. While open-access publishing has expanded dissemination opportunities, it has not fully resolved legitimacy asymmetries embedded in institutional science (Merton, 1973; Latour, 1987).

Artificial intelligence has become a most discussed term with the advent of technology, especially in this digital era. It is the ability of a computer or any other computer-controlled device to perform tasks that needs the application of intelligence like a human. The application of AI is seen in almost every aspect of human life, and education is no exception. This study intended to know the awareness of students studying in music colleges on the application of AI in music education.

Introduction: In asthma patients, reductions in FEV3 and FEV6 may reflect early bronchial obstruction and disease severity. This study aimed to evaluate FEV3 and FEV6 as complementary spirometric parameters to FEV1 for assessing asthma severity and control. Material and methods: Multicenter prospective cross-sectional study exhaustively including 221 adult asthma patients recruited from pulmonology departments at Oran University Hospital (EHU) and Bechar Hospital (EPH) from 04/01/2020 to 12/31/2023.

The study presents the design, simulation in SolidWorks and experimental validation of a mobile solar air cooler using clay as the base material. Faced with the challenges of climate change and limited access to conventional air conditioning in developing countries, this system offers an energy-autonomous and economically viable alternative.

Rice is one of the most widely used staple foods in the world. However, its production is still very limited compared to the exponentially growing demand. Senegal, with an average consumption of 90 kg/habitant, is the third largest importer of rice in Africa. Aware of the impact of imports on the population, Senegal has set itself the objective of achieving food self-sufficiency by 2022 with an average yield of 5T/ha. ISRA, through its research, contributes to the achievement of this objective by developing adapted technologies.