Institut National des Sciences Appliquées Centre Val de Loire

This paper presents an energy-aware Ant Colony Optimization (ACO) framework specifically designed for P-Time labeled Petri Net systems operating under partial observation. As energy consumption becomes increasingly critical in industrial automation, traditional optimization approaches often fail to adequately handle the temporal dynamics and observational limitations inherent in real-world manufacturing systems. We propose an advanced ACO framework that integrates MAX-MIN Ant System techniques with multi-objective optimization strategies specifically tailored for P-Time Petri Nets. Our approach incorporates sophisticated constraint handling mechanisms for temporal intervals, partial observation uncertainty, and energy cost minimization. The experimental validation demonstrates significant energy savings (achieving 1610.67 units compared to 2524.47 units with baseline approaches) and computational efficiency suitable for real-time industrial deployment.

This study aims to analyze the mechanical strength of composites with bamboo fiber and glass powder reinforcement using an epoxy matrix. The study used a hand lay-up method with three variations of volume fraction composition, namely (1) 15% bamboo fiber, 15% glass powder, 70% resin, (2) 20% bamboo fiber, 10% glass powder, 70% resin, and (3) 25% bamboo fiber, 5% glass powder, 70% resin. The bamboo fiber used was the result of alkali treatment using 15% NaOH solution to remove lignin and cellulose, while the glass powder was obtained from household glass waste with a particle size of 60 mesh. Mechanical property testing included tensile testing (ASTM D638 Type 1), compression testing (ASTM D695-96), and impact testing (ASTM D256), while morphological structure analysis was carried out using Scanning Electron Microscope (SEM) testing. The results showed that the volume fraction composition of 25:5:70 produced the highest tensile strength with an average value of 95.69 N/mm² and the highest impact strength of 29.91 J/mm. Meanwhile, the composition of 15:15:70 obtained the highest compressive strength of 57.13 MPa. SEM analysis of the composite fracture showed the occurrence of full out fiber, debonding, and void phenomena in the matrix, which affected the decrease in the material strength value. This indicates that variations in the composition of bamboo fiber and glass powder can optimize the mechanical properties of composites, while supporting the utilization of natural materials and waste as environmentally friendly innovation materials for automotive applications, especially Yamaha Vixion motorcycle visor products.

Effective treatment of abdominal hernia with synthetic implants requires a prosthetic material biologically and mechanically compatible with the tissue. The mechanical compatibility is particularly important because the human abdominal wall is a complex multilayer structure and its properties may have individual characteristics that are not fully known. To address this issue, we propose a novel approach to optimal implant design for hernia repair by modifying locally the implant thickness to adapt it to the applied loads. Compatibility criteria are translated to an objective function that is to be minimized in the optimization procedure. The objective function is designed to equalize and minimize forces at the tissue-implant interface and minimize implant deflection. This reduces vulnerability to failure without hindering functionality. The input data are taken from invivo tests on human subjects performed using digital image correlation and applied to a computational model of the implant defined by means of the Finite Element Method. The results show that the material distribution varies across models with different properties in two perpendicular directions (i.e., orthotropy) and across individuals, suggesting the potential for patient-specific design of the implant and a patient-specific approach to hernia repair. This approach takes into account abdominal wall heterogeneity and anisotropy, which in practice may help to reduce the ventral hernia recurrence rate.