Prospective study of single-stage carbon dioxide refrigeration cycles in a tropical climate.

This numerical investigation presents the comparative study of four refrigeration systems in the meteorologicalconditions of Cotonou (Benin). The systems were modelled and the physical phenomena were simulated under EES(Engineering Equatio

INFLUENCE OF THICKNESS ON PHASE SHIFT AND DAMPING OF A CEMENT – RONIER FIBER COMPOUND

In this document, four samples of composite materials of cement- fiber of the ronier are manufactured to thicknesses of 10; 12; 15 and 20 cm. They are kept in the laboratory (LEMA) for two months. They are subsequently wrapped in glass wool, instrumented

Design and production of software for the sizing of air conditioners in wet tropical buildings

This work deals with thermal comfort and energy efficiency in the building. In Africa, more specifically in humid tropical regions like Benin, when the need for comfort is felt, several means are used. Among the alternatives put in place, it is recorded t

FREE CONVECTION IN A SATURATED POROUS MEDIUM WITH VARYING TEMPERATURE ADJACENT TO A VERTICAL IMPERMEABLE PLATE AT 4°Cse

Several studies on convective flow in boundary layer regime were analyzed for the case of an isothermal vertical plate or variable temperature dipped in a porous medium saturated with water at 3.98 ° C. However, in the situations where the vertical

IoT and web-oriented Secured Parking Guidance and Information System

A secured parking guidance and information system (PGIS) is essential, from the management point of view to improve the efficiency of parking guidance process, and from the security point of view to guarantee the safety of vehicles in garages and

Detection of bacterial spot and yellow leaf curl virusin tomato leaves images using deep learning

In this work, we propose an approach for automatic detection of bacterial spot and yellow leaf curl virus (TYLCV) in tomato leaves images. Our methodological is three steps: images pre-processing, images loading and classification. For this last step, we

Characterisation of black skin stratum corneum by digital macroscopic images analysis

Black skin medical images generally show very low contrast. Being in a global initiative of characterisation of black skin horny layer (stratum corneum) by digital images analysis, the authors in this study proposed a four-step approach. The first step c

CAN WHATSAPP CONTRIBUTE TO ENGLISH LANGUAGE TEACHERS’ PROFESSIONAL DEVELOPMENT? FINDINGS FROM BENIN

Cet essai étudie l’accès et l’utilisation de WhatsApp par rapport au développement professionnel des enseignants de l’anglais langue étrangère au Bénin. Un questionnaire a été adressé à 300 enseignants dont 20 parmi eux ont été interview

Study of the implementation of fibrous materials and earth in hollow body slab in reinforced concrete: case of laterite, Borassus aethiopum and Calamus deerratus woods

This work enrolls in the context of eco materials reinforced concrete. It concerns a possibility of valorization local forestry and mining resources in the design and construction of modern reinforced concrete structures in rural cities. The objective of

Free vibration analysis of dowelled rectangular isotropic thin plate on a Modified Vlasov soil type by using discrete singular convolution method

The behaviour of plates resting on elastic foundations has wide interest because it is an important model for many engineering applications. Natural frequencies and corresponding mode shapes are guides to investigating the behaviour of a soil-structure

Hybrid DSC-T/β-Newmark Method for Dynamic Response Analysis of Isotropic Thin Plates on Elastic FoundationsHybrid DSC-T/β-Newmark Method for Dynamic Response Analysis of Isotropic Thin Plates on Elastic Foundations

The static/dynamic analysis of the thin plate is of great importance in engineering problems. Based on the complexity of the problem, only for some important cases of boundary conditions, analytical solutions were derived. While in general case, numeric

Hybrid DSC-T/β-Newmark Method for Dynamic Response Analysis of Isotropic Thin Plates on Elastic FoundationsHybrid DSC-T/β-Newmark Method for Dynamic Response Analysis of Isotropic Thin Plates on Elastic Foundations

The static/dynamic analysis of the thin plate is of great importance in engineering problems. Based on the complexity of the problem, only for some important cases of boundary conditions, analytical solutions were derived. While in general case, numeric

Carbon Nanotubes and Resistance to Freeze-Thaw Cycles

The research of materials with good properties is one of the important concerns of scientists groups, and more again in region where materials are subjected to freeze and thaw cycles. In the case of this paper, it has been a matter of evaluating of the ef

Physicochemical assessment of urban wastewater of Cotonou (Benin)

The present study aims to fill the data gap analysis in urban wastewaters characteristics in Benin and its statistical analysis. Physicochemical parameters such as pH, electrical conductivity (EC), Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (

DYNAMIQUE SPATIO-TEMPORELLE DES INONDATIONS DE 1980 À 2010 DANS LE GRAND COTONOU

La présente recherche analyse l’évolution spatiale et temporelle des inondations de 1980 à 2010 dans le Grand Cotonou et les facteurs explicatifs. Pour conduire cette étude, les données utilisées se rapportent aux données climatologiques, démo

PRATIQUES DE MOBILISATION DES EAUX DOMESTIQUES DANS LES ESPACES PÉRI-URBAINS DE L’ARRONDISSEMENT D’AKASSATO (COMMUNE D’ABOMEY-CALAVI, BENIN)

La présente recherche vise à étudier les pratiques de mobilisation des eaux pour les usages domestiques dans les espaces périphériques de l’arrondissement d’Akassato. L’approche méthodologique utilisée comprend la collecte des données, le

UTILISATION DU DRONE POUR LE CALCUL DES RESERVES DE GRANITE DU SITE D’OKOUTA DANS L’ARRONDISSEMENT DE SETTO AU BENIN