The rapid advancement of electric vehicle (EV) technology is driving the search for innovative solutions to improve efficiency and performance. This study explores the potential of harnessing dynamo technology to enhance electric car performance. Dynamos, traditionally used in generating electrical power for various applications, offer a promising alternative to conventional power sources for EVs. This research investigates the integration of dynamos in electric vehicle systems, focusing on their ability to provide supplementary power, improve energy efficiency, and extend driving range. Through theoretical analysis, experimental testing, and performance evaluation, the study examines the feasibility, advantages, and challenges of employing dynamos in modern electric cars. The findings aim to provide insights into the practical applications of dynamo technology, contributing to the development of more efficient and sustainable electric vehicle solutions.

The increasing demand for personalized and affordable prosthetic devices has led to significant advancements in 3D printing technologies. Accessible digital restoration methods and Structural forecasting models are revolutionizing the field of Artificial limbs by enabling precise, individualized designs that are both cost-effective and functional. This article explores the integration of digital tools, computational models, and 3D printing in creating high-performance prosthetic devices. It examines key techniques in digital restoration, such as CT scans and 3D modeling software, as well as the role of mechanical simulations in predicting the performance of Artificial limbs. The article also discusses the challenges, opportunities, and future directions of 3D-printed Artificial limbs, with a focus on accessibility, sustainability, and innovation.

Aqueous zinc-based batteries (AZBs) have gained significant attention as a promising alternative to conventional lithium-ion batteries due to their advantages of safety, low cost, and environmentally friendly operation. These batteries utilize aqueous electrolytes, making them inherently safer and easier to manufacture. However, challenges remain in improving their electrochemical performance, including issues related to dendrite growth, limited energy density, and cycle life. This review article provides an overview of the active materials used in AZBs, highlighting recent advancements in cathode and anode materials. We also discuss key aspects of device design, including electrolyte optimization, separator development, and system integration. Finally, the paper explores future directions for the development of AZBs, including strategies to enhance performance, improve cycle stability, and scale up production for commercial applications.

This article reviews the principles and evaluates the performance of advanced selective absorber coatings in a prototype flat-plate solar water heating system. Selective coatings are crucial for maximizing solar energy conversion by achieving high solar absorptance and low thermal emittance. The study explores various coating materials and deposition techniques, with a focus on electrodeposited black nickel coatings. The preparation methods, characterization of coating morphology and optical properties (α and ϵ), and testing of a prototype solar water heater equipped with these coatings are described. Results demonstrate that the nanostructured selective black nickel coatings exhibit high solar absorptance (∼0.90) and low thermal emittance (∼0.15), leading to significantly improved thermal performance and higher collector efficiency compared to non-selective black paint. The study also discusses the durability of the coatings and highlights the potential of alternative materials and techniques like CVD and sol-gel methods for future advancements. The findings confirm the effectiveness of advanced selective coatings in enhancing solar water heater performance and emphasize the need for continued research to improve durability and explore new materials for broader applications in solar thermal technology.

FDM – type 3D printing has greatly increased in recent years but there is still a demand for stronger and stiffer materials. The objective of this work is to extrude and test various types of thermoplastic composite filament to be used for 3D printing. ABS thermoplastics was combined with various lengths of fiberglass. Using these thermoplastic composites several specimens were prepared per ASTM D638 by compression molding and tested. The fiberglass was introduced to increase mechanical strength and stiffness of the thermoplastic filament. Three types of fiber sizing were evaluated, the original epoxy-based sizing, an alkoxysilane Gelest sizing, and a water-based Michelman sizing. One hundred specimens were fabricated from composite material. Specimens varied by sizing, by fiberglass lengths, and by fiberglass volume fraction. Out of all the specimens tested, those with Michelman sizing produced the most consistent and overall best bonding. The Gelest sizing produced the highest and lowest values. Epoxy sizing produced almost as good results, and no sizing was worst. FDM thermoplastic filament of 1.75 mm diameter was extruded, and was used on a ROBO 3D FDM printer to 3D print objects. Mechanical strength and stiffness were not improved as expected because fiber lengths were much shorter than advertised. Other possible reasons include incomplete mixing of materials, processing errors, voids in specimens, and improper treatment of fibers with sizing.