Mohamed Amine Daoud

This paper presents the design and development of a laboratory-scale 3D printing platform intended for research on sustainable construction materials. The growing interest in low-carbon and locally available materials, including clay, geopolymers, recycled aggregates, and bio-based composites, has increased the need for flexible experimental printing systems. However, most existing construction 3D printers are designed for industrial applications and remain costly, bulky, or limited to specific material categories. The proposed platform was developed using a Model-Based Systems Engineering approach in order to structure the design process and establish links between user needs, system requirements, functions, and physical components. The platform is based on modular Cartesian architecture and includes interchangeable extrusion systems. A syringe extruder is used for relatively fluid materials such as clay slurries, ceramic pastes, gypsum-based mixtures, and fluid geopolymers, while a screw extruder is designed for more viscous materials such as mortars, cement-based mixtures, and dense geopolymer pastes. The system also integrates motion-control components, material feeding devices, monitoring elements, and safety functions to ensure stable and repeatable printing conditions. The platform is intended to support the evaluation of printability, material flow, layer deposition, dimensional stability, and interlayer bonding. By combining a flexible hardware configuration with an MBSE-based design methodology, the proposed system provides a practical research tool for the development and validation of sustainable construction materials. It also creates opportunities for future work on multi-material printing, automated process control, and digital manufacturing applications.

3D printing is revolutionizing the cultural and artistic landscapes, notably impacting live arts and scenography by enabling the crafting of complex and tailored designs with unparalleled efficiency. This technology, pivotal to the fourth industrial revolution, transforms imaginative concepts into tangible reality, fostering new pathways for creative exploration. This article investigates 3D printing's profound influence on the theatrical domain, particularly in scenography. It facilitates the creation of groundbreaking decorations and costumes, thus elevating the performance experience and deepening audience engagement. Through a survey conducted among artists in the Arab cultural sector, the study evaluates the contributions of 3D printing to live arts. The findings spotlight the technology's effectiveness in enhancing scenographic elements and underscore the vital role of artificial intelligence in generating unique scenographic designs. Positioning 3D printing as a significant innovation in scenography and a catalyst for creativity in live arts, the article anticipates a future where advanced technology is seamlessly woven into artistic practices. The insights gleaned from the survey and hands-on experiments underscore 3D printing's potential to foster novel artistic expressions, indicating a movement towards an innovative and efficient integration of technology within live arts.

This study introduces an automated test bench designed to optimize flocculation-thickening processes in the wastewater treatment industry. Addressing current challenges in operational efficiency and cost reduction, the test bench employs Model-Based Systems Engineering (MBSE) principles, leveraging SysML modeling within the CESAM framework. By integrating advanced technologies, including PLC programming and a closed-loop control system, this bench provides precise and efficient testing under varying operational conditions. Economic implications are explored, demonstrating the cost-effectiveness of optimized flocculation processes, which reduce chemical use and operational expenditures while enhancing water clarity and sludge management. The system’s 3D modeling enables detailed simulations, aiding in both research and pedagogical applications. This platform highlights the potential of MBSE in creating scalable, robust solutions that contribute to sustainable water management.

The objective of this study is to comprehensively investigate the printability characteristics of a selective laser melting (SLM) system, which will be achieved through the development of a benchmark test part. In addition, the effect of the build location on the dimensional accuracy and precision of 316 L stainless steel parts produced by SLM was thoroughly evaluated.