Physical Sciences and Engineering

The construction of infrastructure capable of withstanding future hazards in the Akpakpa district requires good control of the foundation soils. The test results showed that the Ayélawadjè and Sodjèatimey soils are class D according to the GTR classification and sub-class D1 (VBS<0. 1): insensitive to water, weakly organic and presenting an over-consolidated state, while the Avotrou soils are of class A according to the GTR classification and of sub-class A4 (IP>40%): very plastic with the following main characteristics: very coherent and almost impermeable.

The Bongor region, located between 10°12' and 10°20' North latitude and 15°22' and 15°34' East longitude, is part of the quaternary aquifers of Chad. It has potential in water resources but knowledge of its hydrodynamic and hydrogeochemical functioning remains insufficient. Thus, this study aims to gain knowledge of the hydrogeochemistry of groundwater in the Bongor area and its surroundings.

Railway incidents can have significant safety implications for the railway system, its components, and people involved, leading to train delays and financial losses. Railway forensic investigations play a crucial role in understanding the causes and circumstances of these accidents. This field is continuously evolving and offers scope for improvement. Various organizations are responsible for conducting thorough railway examinations, highlighting the importance of their expertise in investigations. Examining rolling stock is essential for analyzing train condition and performance.

The stability of the bcc non-magnetic (NM) state in Vanadium (V) and the optical properties are investigated, using the full-potential linearized augmented plane wave (FP-LAPW) method with the generalized gradient approximation (GGA) and GGA+U within the framework of density functional theory (DFT), as implemented in the WIEN2k computational package code. As compared to other 3d transition metals such as Fe, Co, and Ni, the non-magnetic state of bcc V has been found to be distinct from that seen in previous studies.

Background: Down syndrome is characterized by general mental and physical disorders, or by isolated walking, cognitive, growth, or sensory disorders. Objective: The study examined the impact of an integrated sensory approach on the improvement of balance and motor coordination in children suffering from Down syndrome. Methods: Thirty children were randomly divided into two categories: group A received a combination of sensory integration and physical therapy, Group B received only the physiotherapy program.

The compound oxazole and its derivatives are crucial to the field of medical chemistry. The oxazole nucleus is a heterocyclic five-membered ring that has been explored in an effort to develop new molecules with advantageous biological properties. In recent years, the use of oxazole as intermediates in the synthesis of novel chemical entities in medical chemistry has risen. Oxazole has sporadically been used as a functional lead molecule in contemporary pharmaceutical chemistry.

This study proposes the investigation of water harvesting on the hybrid surface with different super hydrophilic sizes, which is inspired by the water-capturing behavior of the Stenocara beetle. The combination of water collection (superhydrophilic spots) and water-driven (superhydrophobic area) facilitates the water collection process on such a unique morphology. The results describe the importance of contact angle hysteresis in the determination of collection efficiency.

The ternary cubic condition 6(x2+y2) - 11xy + x + y+ 1+552z3 is considered for deciding its non-zero particular basic arrangements utilizing the linear transformations , and utilizing the strategy for factorization in complex forms, various methods of essential answers for the ternary cubic condition viable are gotten. In each method, fascinating relations among the arrangements, a few exceptional polygonal, pyramidal numbers and focal pyramidal numbers are displayed.

This study involves geological material, topographic phenomena and the river system in a cause-and-effect relationship in the Mayo-Kebbi watershed. This river connects South - West Chad to Northern Cameroon via the Benoué River, which connects with the Niger river basin. The main objective of this work is to understand the influence of geological material and topographic factors on the Mayo-Kebbi hydrographic system. For this purpose, the description of the rocks in place and their structure was made on the basis of a state of the art of the acquired knowledge.

The external quantum efficiency EQE(λ) is the fraction of photons incident on the solar cell that create electron-hole pairs in the absorber, which are successfully collected. It is wavelength dependent and is usually measured by illuminating the solar cell with monochromatic light of wavelength λ and measuring the photocurrent Iph through the solar cell. The aim in this work is to show the external quantum efficiency and the spectral response for the screen-printed solar cell under different illumination. The photocurrent delivered by the solar cell is highlight for each illumination.