6 publications from this institution
The physical, mechanical and morphological data of foods are essential in the separation and aeration processes, whether in the case of transportation or storage, in order to preserve the freshness of these products, and in this context we try to predict and implement some experiments that will be validated through equations, where it is desirable to determine the relationships among the characteristics. Key physical and mechanical parameters, for example, fruits are often classified by size, but it may be more economical to develop a method that classifies them by weight when designing a machine, the relationship between weight and intermediate dimensions is essential. These physical and technical properties of the potato had to be evaluated to know the effect of surface conditioning, the limits of loading without damage, as well as to allow the volume of breathing during all stages of the life cycle especially in the case of harvesting, transportation and storage, which is also important for the design of harvesting and harvesting equipment. Psychiatric treatment. The shape of potato tubers is as complex as any agricultural product, therefore, in order to determine the mechanical and physical properties, it has become more and more necessary to find all the necessary data and prove the basic viscoelastic behavior of this material, especially since then. The product is consumed by all worlds.
This paper aims to map and quantify water erosion in the El Gouazine watershed using four empirical models integrated into a Geographic Information System (GIS). The models studied are the Universal Soil Loss Equation (USLE), its revised version (RUSLE), its development (MUSLE) and the FAO equation. Using these tools, a synthetic map of soil losses was created, providing an overview of the intensity and distribution of erosion. The results show that more than 74% of the basin suffers from low erosion, with losses less than 2.5 tons per hectare per year, while 20% of the area is affected by moderate erosion (2.5 to 10 tons/ha/year), and 13.74% by severe erosion (greater than 15 tons/ha/year). After the implementation of sustainable soil and water management (SWM) practices, a significant reduction in erosion was observed, illustrating the effectiveness of the interventions. The RUSLE and MUSLE models showed substantial reductions in soil losses, confirming their essential role in preserving natural resources and limiting erosion. Soil erosion is a major threat to agricultural land in Tunisia, affecting approximately 3 million hectares and posing a risk to the sustainability of small hilly lakes. In the El Gouazine watershed, located in central Tunisia, this phenomenon is amplified by a semi-arid Mediterranean climate, rugged topography, fragile soils, and increasing anthropogenic pressure.
There is always time and energy optimization and reduction of faults the aim of research and in this context our article presents a study of a practical case of the deformation of a plastic part placed in a refrigerator for food storage, and that the use increases in number of these types of metals, are found in several sectors, and because of their industrial performance, a minimum residence time of the part in the mold is sought in order to reduce the cycle time of the process at the same time that the injection process is quite complex and requires a certain number of recurring questions to succeed. In the desired model. These are linked to residual stresses and deformations, pressure, mold temperature, filling threshold, shape of the part, but also to other mechanical and optical properties. Several investigations have been carried out and according to the authors the causes of these failures vary according to the manufacturing technique used. In this article, we try to find the origin of a deformation detected on a part at the end of the mold. Our work consists first of all in presenting, according to different studies, the thermomechanical properties of the material injected at different stages of the injection process. In a second step, compare the theoretical and analytical results. At the end of our study, we propose an optimization of the parameters necessary for the success of the molding and of the geometry of the assembly (mold and part).
Cutting green or dry crops requires the use of cutter bars or cutter bars, minimizing fruit loss as much as possible and also adapts with the geometry, in particular the terrain of the potatoes during the weeding phase. Currently, two types of cutter bars are fitted to mowers, combine harvesters, hedge trimmers, etc. Among these two types, single blade cutter bars are the oldest and most common while the more recent double-blade cutter bars remain the most efficient despite all the technological complications which more or less affect their commissioning. Thus during the operation of these machines a very agitated kinetodynamic behavior (presence of fluctuation, shock and vibration), was found compromising the conduct of the cutting operation, the premature wear of the moving parts, the efficiency of the machine and even its survival. The choice of the theme of this work was dictated by general considerations on the project to improve the cutting operation, essentially aimed at reducing the risk of jamming, calming the noisy operation of the unit, eliminating the vibrations which the system is the seat and thus improve the performance of the machine through the design and introduction of a new architecture of the mechanism controlling the movable cutting members.
This article presents a finite element study based on tests of characterizations to find the properties of the materials studied, the injection-blowing technique, chosen in this case, is characterized by the bi-axial of the material, and one benefits from the orientation of the macromolecules in the directions of use of the material. The objective of this work is to link all the mechanical and thermal parameters during the treatment of molten polymer materials subjected to high-stress rates that can lead to significant temperature increases due to viscous heating in the order of 200�C. Predicting the temperature range is essential for good temperature control and is a major factor in determining the quality of the final product. This forces us to choose an adequate law of behavior, capable of translating the mechanical evolution under the thermal effect while explaining the rheological response of the viscoelastic metal. So this process is usually accompanied by geometric defects resulting from the original residual stresses cooling speed and the process itself. In the packaging of food products, as in this case, the bottles require to have a stable filling and a certain storage capacity.
