Volume 18 Issue 2

S.No.	Article Title & Authors (Volume 18, Issue 2, April - 2025)	Page Nos.	Status
1.	Effect of Drying on the Encapsulation of Beauveria bassiana in a Polymeric Nanocomposite Matriz Ingrid Vieira Fernandes Monteiro, Bruno Roberto Silva de Melo, Camila Braga Dornelas International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 2, pp. 29-39, April 2025. ABSTRACT The use of polymeric matrices in the encapsulation of entomopathogenic fungi ensures the preservation of the inherent characteristics of the fungi, protecting them against external factors. However, depending on the dehydration technique used, the encapsulation capacity of the bioactive compound may be compromised. Thus, an encapsulation matrix in the form of beads of the fungus Beauveria bassiana composed of alginate and bentonite was developed through ionotropic gelation and subjected to different drying techniques. The matrix was characterized using XRPD and FTIR techniques, which confirmed the interaction between the compounds. The products were evaluated in terms of: average particle size, swelling index and in vitro release. Beads dried through lyophilization presented a higher average particle size, as well as enhanced water absorption capacity. The release analysis revealed the barrier effect exerted by the clay, acting as a protective agent against damage to the fungus caused by the lyophilization process.	29-39	Online
2.	Optimization of a Vehicle Mount Project via a Primal-Dual Interior-Point Algorithm Marcos R. C. Fonseca and Marco A. Luersen International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 2, pp. 40-50, April 2025. ABSTRACT The mount project is extremely important to ensure good isolation of equipment that generates vibration, be it a motor, a hydraulic pump, a compressor, among others. For the mount project, the positioning of the mount and its stiffness are very important characteristics, as they influence the independence of the moving directions and also the isolation performance. For the application of mount project in powertrains, this is not different, as the high isolation performance of the mount is extremely important to ensure the reduction of vibration transmission from the powertrain and, for this, the stiffness of the mount and its attachment point must be adequately selected. Another important factor in the mount project is the modal purity, which quantifies the decoupling between the degrees of freedom, and the greater the modal purity, the greater the decoupling of each degree of freedom in each direction. This is important to reduce the vibrational effects transmitted from a given force in a given direction and also for better control of the vibrational distribution of the system. To describe the modal purity, it is necessary to have information on the natural frequencies and vibration modes of the powertrain suspended on the mounts. To evaluate the isolation performance, the stiffness and damping of the mount must be carefully determined to ensure good isolation. In this work, analytical solutions are developed taking into account the parameters of stiffness, mount damping, mount position, mount angle, mass and the inertia tensor. With these analytical solutions, it was possible to develop an optimization process using optimization algorithms with the objective of finding the parameters that generate high vibrational isolation performance and high modal purity. After optimization significant improvements were observed. The modal purity of each degree of freedom was generally higher than 85%, whereas, before optimization, there were modal purities below 50%. While the most common approach is to work only with the stiffness to meet the modal purity and the mount isolation performance this work expands and investigate deeper the potential to improve these parameters including the mount position in this optimization iteration process.	40-50	Online
3.	Allocation Hybrid WSN Mobile Sensor Node for Optimal Dynamic Coverage Control Monik Silva Sousa and João Viana da Fonseca Neto International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 2, pp. 51-66, April 2025. ABSTRACT In wireless sensor networks (WSNs), coverage is an essential performance metric for monitoring delimited regions, with the allocation of sensor nodes being a critical problem for ensuring full coverage. This paper addresses the optimal allocation of mobile sensor nodes based on optimal control techniques, proposing a solution to the allocation problem, considering that the number of available nodes is sufficient to achieve full coverage. The proposed methods and algorithms for optimally allocating dynamic sensor nodes provide flawless coverage and without loss of connectivity among nodes. Based on the angular velocity of the agents, a coverage control scheme is developed, with the displacement to the specified position guaranteed by the discrete linear quadratic tracker (DLQT) and this position maintained by means of the discrete linear quadratic regulator (DLQR), in order to reduce the arrival time and residence time, respectively, in the angular position. In this scheme, the monitoring region is a delimited circle, with a static sensor node at its center. The mobile sensor nodes are positioned on a displacement circle with a radius smaller than that of the monitored region. The order of these dynamic agents along the circle is preserved to avoid collisions. Finally, the results presented indicate that the network topology, its modelling, and the proposed controller are efficient for application in monitoring hostile environments, providing greater network reliability.	51-66	Online
4.	Study of the Influence of the Protection Arrangement on Piezo-Electric Transducers Applied in the Electromechanical Impedance Technique in Concrete Structures Lucas Gomes, Leila Aparecida de Castro Motta,Raquel Naira Fernandes Silva International Journal of Advances in Engineering & Technology (IJAET), Volume 18 Issue 2, pp. 67-78, April 2025. ABSTRACT This paper presents an analysis of structural integrity monitoring using the electromechanical impedance method together with a finite element model. The objective is to implement and evaluate a protection arrangement for piezoelectric transducers, verifying their influence on damage detection. The methodology uses piezoelectric transducers embedded in the structure to acquire impedance signatures, where changes in the curve indicate potential damage. To identify the presence of damage, specific metrics are evaluated that allow detecting the presence of damage characterized by displacements in the signatures. The experiment compares a simulated model with a concrete sample tested in a controlled environment. The results show the correlation between the model values and those observed in the tests, evidencing the efficiency of the applied metrics.	67-78	Online