Vol. 5 No. 07 (2025)

This paper presents the experimental test results of hybrid steel–glass fiber reinforced polymer (GFRP) reinforced concrete beams under four-point bending, and compares them with conventional steel reinforced concrete beams.

This in the article developed in countries digital of the economy development, digital of technologies economy and finance in the fields of influence, internet services, online banking and insurance, as well as in enterprises digitization processes analysis will be done. In research statistician information and international experiments based on digital economy development current directions open will be given.

This article presents the development of a device for separating and fractionating chickpea seeds from pods, as well as the results of a theoretical study of the seed coverage process within the device. The results of the theoretical research show that the proposed device ensures high completeness of chickpea seed separation from pods and minimal damage to the seeds when the maximum coverage angle for feeding seeds into the separation mechanism reaches 90°.

The article presents the development of an improved device aimed at increasing the efficiency of the process of separating and cleaning bean seeds from pods, as well as the optimization of its main structural dimensions and operating modes. The results of experimental studies showed that in the proposed device, complete separation of bean seeds from the pods, minimal seed damage, low seed loss, and high seed purity can be achieved when the shaft rotation speed is 450 min⁻¹, the number of beaters is 22, the length of the beaters is 230 mm, and the fan rotation speed is 2000 min⁻¹.

The development of efficient and robust wind energy harvesting systems is essential to meet the growing demand for sustainable and decentralized energy sources. This study explores structural design strategies for omnidirectional wind energy harvesting using triboelectric nanogenerators (TENGs). By leveraging the triboelectric effect and advanced material configurations, TENG-based systems offer significant potential for low-cost, lightweight, and scalable wind energy solutions. Various structural designs, including flutter-driven, rotary, and hybrid configurations, are analyzed with respect to their mechanical-to-electrical energy conversion efficiency, adaptability to multi-directional airflow, and environmental durability. The paper also discusses design optimizations that enhance charge transfer, frequency response, and energy output under fluctuating wind conditions. Experimental prototypes and simulation results demonstrate the feasibility and performance of these approaches, highlighting their applicability in powering small electronic devices, sensors, and microgrids, particularly in remote or urban environments with variable wind directions.