இராஜலக்ஷ்மி பொறியியல் கல்லூரி, இந்தியாவில், தமிழ்நாடு மாநிலத்தில், சென்னை அருகே திருபெரும்புதூரில் (ஸ்ரீபெரும்புதூர்)உள்ள தண்டலத்தில் அமைந்துள்ள ஒரு தனியார் பொறியியல் கல்லூரி ஆகும். இக்கல்லூரி இராஜலட்சுமி கல்வி அறக்கட்டளை, இராஜலட்சுமி நிறுவனங்களால் 1997 இல் நிறுவப்பட்டது. Rajalakshmi Engineering College is a Private engineering college located at Thandalam, Sriperumbudur near Chennai, Tamil Nadu, India. The college was established in 1997 by the Rajalakshmi Educational Trust, Rajalakshmi Institutions.
A subgraph of the square lattice with all of its inner faces being 4-cycles is called a square-cell configuration. Prior work has provided explicit expressions for the total and average distances between vertex pairs in symmetric square-cell configurations, including well-structured families such as hexagonal square-cell configurations H(n), trapezium square-cell configurations T(n,k), and bitrapezium square-cell configurations BT(n,k_1,k_2). In this article, we further extend the square-cell configuration from regular boundaries to irregular boundaries, which do not exhibit complete regularity or symmetry in their structure. We find the generalized expressions for the Wiener index and average distance of such irregular configurations, incorporating combinatorial and structural variations. Our results demonstrate how irregularity affects the growth and distribution of pairwise distances and provide a unifying framework that includes both symmetric and asymmetric square-cell graphs as exceptional cases. This generalization provides novel insights into the structural behaviour of square-cell frameworks characterized by complex or perturbed geometries.
Carbon nanotubes (CNTs) are promising nanofillers for enhancing the performance of chloroprene rubber/natural rubber (CR/NR) composites. In this study, CNTs were incorporated into CR/NR blends at loadings up to 10 phr using melt mixing, and their influence on curing, mechanical and physical properties was systematically evaluated. Key properties studied included tensile strength, stress at 100
Biomaterials and tissue engineering are crucial in wound healing and replacement surgeries. In this study, a synergistic composite coating was developed on 316 L stainless steel by integrating electrophoretically deposited nanohydroxyapatite (nHAP) with electrospun polymer nanofibers. The nHAP layer provided a bioactive, mineral-rich interface mimicking natural bone, whereas the polymer nanofiber mat enhanced mechanical stability, controlled degradation, and improved cellular attachment. Comprehensive characterization through hardness testing, FTIR, XRD, and SEM confirmed the structural integrity, molecular interactions, and morphological features of the fabricated scaffolds. Microstructural analysis confirmed uniform deposition and strong interfacial bonding between the two coating layers. Electrochemical testing demonstrated significantly improved corrosion resistance compared to uncoated substrates. In vitro assays revealed enhanced osteoblast adhesion and proliferation, highlighting the coating’s cytocompatibility. The combined approach leverages the strengths of both ceramic and polymer components, offering a promising surface modification strategy for next-generation orthopedic implants aimed at improving long-term integration and functional outcomes.
Underwater Friction Stir Welding has arisen as proficient solid-state joining method for aluminium alloys necessitating stringent heat regulation. This work experimentally tested and systematically optimized the mechanical performance of 5 mm thick AA5754 butt joints produced by Underwater Friction Stir Welding. The influence of tool rotational speed, axial force and welding speed, on microhardness and tensile strength was assessed by an experimental design based on Taguchi orthogonal array. ANOVA were utilized to assess significance and impact of each process parameter. A multi-criteria decision-making (MCDM) MEREC and CoCoSo approaches was employed to determine best parameter combination, thereby addressing constraints of traditional single-response optimization. The findings indicate that tool rotational speed is the predominant contributor, succeeded by axial force and welding speed. Ideal process parameters for enhanced ki was determined at a a tool rotation speed of 1100 rpm, an axial force of 6 kN, and welding speed of 20 mm/min, corresponding to (X2 Y2 Z2). The enhanced UFSW condition led to a significant enhancement in joint efficiency and tensile strength, achieving approximately 90
Bio polymer derived from the biodegradable natural plant resources are getting wide attention in production of light weight high performance composite materials offsetting the utilization of fossil fuel based synthetic man-made polymers, due to their eco friendliness, lower environmental impact, and higher thermal stability. Even though, the challenges in achieving higher mechanical properties of biopolymers composites need to be addressed through adding the natural fillers and bio fibers in various proportions. This present work employs the Moringa Oleifera (MO) fibers, Polysaccharide (PS) fillers to reinforce with the polylactic acid (PLA) bio resin to fabricate the series of six different bio composites through compression molding method by changing the volume fractions of raw materials as 10:5:85, 15:5:80, 20:5:75, 10:10:80, 15:10:75 and 20:10:70
