Karpagam College of Engineering is an autonomous institution of the Karpagam Charity Trust established in the year 2000. The college is one of the Karpagam Educational Institutions, affiliated with the Anna University of Chennai and approved by AICTE.[citation needed] It is also accredited by NBA, TCS, Microsoft and Wipro.[citation needed] The programmes offered by the college include nine for undergraduates and five for postgraduates.
Emotion detection, empathy modeling, and emotion and empathy modeling in the presence of digital social systems and low-resource languages such as Tamil have been important areas to focus upon in recent times. The Emotion and Empathy-Aware Knowledge-Augmented Transformer (EEAKAT), proposed in this paper, is based upon multi-task learning with assistance from external knowledge graphs such as ConceptNet and EmoNet, designed to improve emotional content understanding in this aspect. Emotion-driven attention is used in EEAKAT to give importance to key emotional indicators, contrastive learning to highlight subtle emotional differences, and reinforcement learning based on knowledge feedback to develop emotional content-related responses in empathy appropriately. The proposed framework is designed to facilitate emotional assistance in real-world areas such as mental health support services, analysis in social media, by learning to undertake emotional aspects in unison in real-world contexts. The achievement of EEAKAT is measured in terms of accuracy at 0.735, F1-score at 0.725, and Mean Squared Error at 0.030 in empathy prediction, along with BLEU Score of 0.640 in response generation, reflecting EEAKAT’s effectiveness in being a proficient emotion and empathy modeling framework to improve sentiment-driven social systems in low-resource linguistic settings.
Interest in waste-to-energy technologies, especially the co-pyrolysis of biomass, food, and plastic waste, has grown as a result of the world’s significant increases in waste production and energy demand. In this study, energy-rich biofuel and value-added chemicals were recovered from waste materials. The feedstocks used were fish waste, sugarcane bagasse, and waste plastics. The plastics included polyethylene (PE), polypropylene (PP), low-density polyethylene (LDPE), and high-density polyethylene (HDPE). These wastes were collected from commercial, agricultural, and residential sectors. The experiments were carried out with the motive of producing more pyrolysis liquid by blending fish waste with waste plastics (FWP) and sugarcane bagasse with waste plastics (SBP) in equal proportions in a fixed bed reactor under different operating temperatures between 350 °C and 550 °C. The maximum oil product yields for the pyrolysis of FWP were 52.0 wt
Reduced graphene oxide (rGO) composites demonstrate favorable energy storage characteristics, including adjustable porosity, superior conductivity, chemical stability, and remarkable charge storing capacity. Nonetheless, the intrinsic rigidity of rGO constrains its application in contemporary disposable and flexible energy storage systems. This paper details manufacture of flexible composites based on reduced graphene oxide and iron sulfide, utilizing natural fibers derived from discarded bioresources, specifically pineapple leaf fiber, as a binder. The novelty of this work lies in the sustainable utilization of pineapple leaf fiber (PALF) as a bio-binder combined with microwave-assisted rapid synthesis and electrodeposition-controlled tuning of Fe₃S₄ to fabricate highly flexible and eco-friendly paper electrodes. The rGO and iron sulfide (Fe₃S₄) nanoparticles are produced by a rapid microwave-assisted method. Additionally, Fe₃S₄ nanoparticles are electrochemically coated on synthesized rGO- paper electrodes to improve energy storage and electronic conductivity properties. Highly flexible paper electrodes were analyzed using several characterization techniques, including Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and scanning electron microscopy (SEM) examined their chemical bonding and morphology. Electrochemical assessments, comprising Galvanostatic Charge/Discharge (GCD), Electrochemical Impedance Spectroscopy (EIS), and Cyclic Voltammetry (CV) were conducted to analyze capacitive and kinetics characteristics of electrodes. LC/rGO/Fe₃S₄ at 2400 s demonstrates a specific capacitance 69.79 F/g, rGO/LC, which were 60 F/g. The value of 69.79 F/g was obtained in a three-electrode configuration, whereas the 39.8 F/g value corresponds to the assembled symmetric device configuration. The synthesized tertiary composite (rGO/LC/Fe₃S₄) exhibits exceptional charge-discharge performance. The LC/rGO/Fe₃S₄ configuration has a power density 4.6 W/kg on 12 Wh/kg a specific capacitance 39.8 F/g over 2400 s. The rGO/LC/Fe₃S₄ (2400 s) electrode has superior electrochemical properties, evidenced by lower Rs (1.8 Ω) and Rct (0.3 Ω) values in comparison to the binary composite (rGO/LC). These composites offer profound understanding of the fabrication of electrodes exhibiting strong ionic and electrical conductivity for rapid energy storage systems. The electrochemical performance obtained in this study is comparable to or exceeds previously reported rGO/iron sulfide-based flexible electrodes, highlighting the effectiveness of the proposed fabrication strategy.
The utilization of fiber-reinforced composite materials is increasingly prevalent in the aerospace, structural and automotive industries, owing to lightweight characteristics. This research evaluates tamarind seed shell powder (TSSP) reinforced Waru bark-Banana pseudostem (WBBP) fiber composites, fabricated using compression molding. TSSP was incorporated at weight ratios of 0, 2, 4, 6, and 8 wt
A double slope solar still (DSS) gives more productivity than a single slope solar still (SSS). However, its efficiency remains low and it is strongly dependent on climatic conditions. This study aims to enhance the performance of DSS by using natural fibers (Banana, Sisal, and Palm) as wick materials in combination with an Al2O3 and Glauber Salt (GS) based nano phase change material (nano-PCM). The addition of Nano-PCM composite improves the storage capacity of heat energy, and natural fibers improve the capillary action and spreading of water. Experimental study reveals that the sisal fiber with Nano-PCM composites provides the best productivity of 4.58 l/day, which is 115.02 % higher than the conventional DSS. This improved water productivity of the sisal and Nano-PCM combination is due to its highest evaporative heat transfer coefficient value of 164.24 W/m2K. The average energy efficiency and exergy efficiency are also high for the sisal fiber and NanoPCM combination, which provides 35.34 % and 3.33 %, respectively. The average energy efficiency and exergy efficiency of the sisal fiber and nano PCM combination are 76.2 % and 114.4 % higher than the conventional DSS. Economic study reveals that the water production cost of sisal and nano PCM is just $0.012 per liter, with a payback (PB) period of around 143 days (4.7 months), whereas the production cost of CSS is $0.021, with a PB period of 231 days (7.7 months), respectively.
