Volume 12 | Issue 3 |

 Abstract

This research paper investigates the healing performance of epoxy matrix carbon fiber reinforced polymer composites, focusing on their ability to self-repair structural damage. The study explores the potential of these composites to autonomously heal microcracks and delamination, which can occur during service conditions, thereby extending the operational lifespan of composite structures. Through a comprehensive literature review, various healing mechanisms in composite materials are examined, highlighting the significance of healing performance in enhancing material durability and reliability. Experimental methods are employed to assess the healing capabilities of the composites, including characterization techniques such as optical microscopy, mechanical testing. This test are performed by varying the GO content from 0% to 1%. Thus maximum amount of fracture load obtained at the 0.50%.The results provide insights into the effectiveness of different healing mechanisms and their influence on the mechanical properties of the composites. The findings of this study contribute to the understanding of self-healing materials and have implications for the development of advanced composite structures with improved damage tolerance and longevity.

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 Keywords

Epoxy, Carbon fiber, Graphene oxide, catalyst, peel ply.

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The research investigates the combustion characteristics of a 4-stroke VCR Diesel engine by adding zinc oxide nanoparticles and using flax seed oil as an alternate fuel. The experimental setup includes testing several fuel samples. These samples contain traditional diesel as well as the beneficial of adding zinc oxide nanoparticles (ZnO NPs) to B20-grade flaxseed oil biodiesel together with dispersion (Triton X) and surfactant (CTAB) additives. B20 with 50 ppm ZnO NPs (B1), B20 with 50 ppm ZnO NPs and 50 ppm surfactant (B2), and B20 with 50 ppm ZnO NPs and 50 ppm dispersant (B3) were the three different mixes that were made. A comprehensive evaluation was conducted to determine how various additions affected the stability and combustion properties of the biodiesel. While flaxseed oil biodiesel and zinc oxide nanoparticles were used, engine operating characters significantly improved. According to the performance parameters, after improvements were made to the combustion characteristics such as cylinder pressure (CP), Net heat release rate (NHRR), Mean gas temperature (MGT) rises by 1.2%, 2.98%, and 10.22%, respectively.

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 Keywords

Flaxseed oil, VCR Diesel Engine, Zinc Oxide nanoparticles, Combustion Characteristics, Alternative fuels.

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Inverter -are often needed at places where it is not possible to get AC supply from the mains. an inverter circuit is used to convert the dc power to ac power can be of two types True/pure sine wave inverters and quasi or modified inverters these true/pure sine wave inverters are costly while modified quasi-inverters are inexpensive. this modified inverter produced a sine wave and these are used to power delicate electronics equipment. here, a simple voltage driven inverter circuit using power IGBT as switching devices is build, which converts 12v dc signal to signal phase 220volt ac with the help of step-up transformer. The basic idea behind every inverter circuit is to produced oscillation using the given dc and apply this oscillation across the primary of the transformer by amplifying the current. This primary voltage is then stepped up to higher voltage higher voltage is then stepped up to higher voltage depending upon the number of turns in primary and secondary coils.

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 Keywords

Power Inverter; Dc/AC, sine wave; Oscillator; Transformer.

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This project explores the fabrication of composite materials using bamboo mat, jute fiber mat and epoxy resin focusing on improving mechanical properties by using TiO2. The process involves mixing epoxy resin with filler material and hardener, applying it onto PVC sheets fixed to metal plates, and layering bamboo mats soaked in the resin mixture. The composite is compressed using a Universal Testing Machine (UTM) to remove excess resin and achieve the desired thickness. After hardening, excess resin is machined off, and the composite is ready for tribological, mechanical, and physical testing. The method offers a straightforward approach for producing composite materials suitable for various engineering applications.

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Bamboo mats, jute fiber mat, Epoxy resin, Titanium dioxide, Resin infusion, wax ,ms plates.

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A reliable human recognition scheme is required in wide variety of systems to either verify or identify the identity of an individual requesting their services. Using traditional approaches such as possession based and knowledge based systems, it is very difficult to differentiate between an authorized person and an impostor. This is a strong reason for replacing traditional ID-based systems with biometric systems which are based on human traits that cannot be denied, stolen, or faked easily. Biometric recognition refers to the automatic recognition, based on physiological and /or behavioral characteristics of an individual. By using biometrics, it is possible to establish an individual's identity based on "who he or she is" rather than by "what he or she possesses likes smart card" or "what he or she remembers likes password." Human ear due to its consistent behavior over the age, has gained much popularity in recent years among various physiological biometric traits. The decidability index of the ear has been found that magnitude significant greater than that of face. Ear remarkably consistent and does not change its shape under expressions like face. The shape of the outer ear is recognized as a valuable means for personal identification. Naturally, an ear biometric system consists of ear detection and ear recognition modules. Ear biometric has played an important role for many years in forensic science and its use by law enforcement agencies.

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Physiological Characteristics

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Abstract: Of late, the landscape of education of students has been reportedly progressive and remarkably competitive. The knowledge they have gained is enormous with the help of various sources of information. Plenty of information is available at their fingertips. . But one of the most important factors the students need to concentrate is their employability skills. Many students struggle a lot to get job, not because of their lack of knowledge, but paucity of Employability Skills. Soft Skills are the part and parcel of employability skills. Nowadays, enhancing the employability skills with the help of e-learning is not only an absolute possibility but also a definite necessity. Almost every student accesses his/her study materials at the touch of the screen (smart phone). This paper describes the ways and means of enhancing the employability skills such as Job skills, Aptitude skills, Soft skills and Technical skills (JAST) through e-learning, which in turn increases the opportunity of getting employed or become the most sought after in the job market.

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Keywords: E-learning, Employability skills, Online, Soft skills, Student

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In this article, a new solar PV fed Dynamic Voltage Restorer (DVR) based on Trans-Z-source Inverter (Trans ZSI) is proposed to improve the power quality of ongrid Photovoltaic (PV) systems. DVR is a power electronic compensator using for injecting the desired voltage to the Point of Common Coupling (PCC) as per the voltage disturbance. In the proposed DVR, in place of traditional VSI, Trans ZSI with outstanding merits of buck/boost, a broader range of voltage boost gain, fewer passive components, and lower voltage stress, is put forth. For efficient detection, accurate voltage disturbances mitigation, and also lessening the injected voltage harmonics, a hybrid Unit Vector Template with Maximum Constant Boost Control (UVT-MCBC) method is proposed for Trans ZSIDVR. The performance of the proposed Trans ZSI-DVR with UVT-MCBC has been analyzed under severe sag, slight sag with harmonics, swell, and interruption. The comparative studies and simulation results have shown the effectiveness of the proposed Trans ZSI-DVR, as opposed to traditional ZSI-DVR and VSI-DVR. The Trans ZSI-DVR in the PV system has mitigated voltage sag/swell/interruption. It has also improved the power quality of both the injected voltage to the PCC and PV system's output voltage.

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 Keywords

PV, DVR, Trans ZSI, voltage sag, voltage transient, THD

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the development of an electric vehicle is a result of air pollution caused by automobiles. The goal of an electric automobile is to reduce pollution, but the major challenge with them is charging. The car should be charged at the same pace as it is filled with fuel in an electronic charging station. To enhance the charging speed of an electric car, a PID controller, a fuzzy logic controller, and a buck-boost controller are employed in this study. The electronic charging station must be able to charge a variety of electric vehicles with varying capacities in a short amount of time. The material in this article is about quick charging of an electric car that was developed in MATLAB. Best possible outcomes the circuit's performance can be improved with the aid of simulation. The best performance is shown in this article which is to use fuzzy logic which is supplied to 3 different chargers with their voltage levels such as 42v, 48v, 52v when charging EV batteries There is voltage difference, the switches are created are provided with a particular charger base this switching action can be controlled using the Fuzzy controller this result can be achieved using MATLAB simulation another advantage of this system that we have observed every results before the actual implementation of hardware and the purpose of this system we can store the charging and discharging of EV batteries and improves the maximum efficiency and life of EV batteries.

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Keywords-- AC/DC converter, DC/DC converter, Buck converter with PI Controlled, EV battery, Fuzzy Logic controller,

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In-service teacher education plays an important role in improving the quality of education by developing and supporting teacher competency continuously. This study aims to investigate the effectiveness of professional development programs for in-service teacher educators, explore the key components of teacher competency, and examine the significance of ongoing support and mentorship in enhancing teachers' effectiveness. Using a descriptive research methodology, data were collected from both primary and secondary sources. Primary data included data from various in-service teachers' program across the nation focusing more specifically in the state of Odisha, while secondary data comprised research articles, policies, and program documents. Analysis was conducted through qualitative content analysis. The findings reveal the effectiveness of various professional development programs, such as Faculty Development Programmes (FDPs) and online platforms like DIKSHA, NISHTHA, SWAYAM, and NCERT, in upskilling teacher educators. These programs focus on enhancing pedagogical content knowledge, access to research, and instructional quality. The availability of research, pedagogical content knowledge, professional development, and high-quality instruction are all important aspects of teacher competency. These elements have a big impact on how well students learn, highlighting how crucial it is for teachers to always be learning and adapting. Moreover, government programs like PSSCIVE, CIET, PARAKH, and SCERT--which offer continuous support and mentorship--are essential in promoting teacher efficacy. These programs provide educators with tools, orientation sessions, and training programs to help them acquire the skills and competences they need. The study's result emphasizes how crucial in-service teacher education is to advancing teacher competency and, eventually, enhancing student outcomes. Education professionals can establish inclusive and productive learning environments that cater to the different needs of students by giving priority to continuous support, mentorship, and professional development opportunities.

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 Keywords

Competency, Pedagogical Knowledge, FDP, In-service Teacher Educators

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A novel rapid, sensitive and reproducible mass compatible, ultra-performance liquid chromatographic method was developed for quantitative determination of Lamivudine in active pharmaceutical ingredients and its dosage forms. The synthetic nucleoside reverse transcriptase inhibitor analogues, Lamivudine form one of the fixed dosage combinations used in the effective management of HIV. It belongs to a group of anti-HIV medicines called non-nucleoside reverse transcriptase inhibitors (NNRTIs). The method is applicable to the quantification of related compounds of Lamivudine form one of the fixed dosage combinations. The developed HPLC method was further subjected to hydrolytic, oxidative, photolytic and thermal stress conditions. The performance of the method was validated according to the present ICH guidelines for specificity, limit of detection, limit of quantification, linearity, accuracy, precision, and ruggedness.

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Lamivudine, Force degradation studies, UV-visible spectroscopy method

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