Sachin Kumar

This research contributes to the current discourse about the role of parentocracy in the expansion of shadow education (known as private tutoring or supplementary instruction) for primary -grade children. Multiple data collection techniques were employed through the distribution of open-ended questionnaires and one-to-one semi-structured interviews, involving 171 parents of primary-grade children belonging to North India. The thematic analysis of the data highlighted the motivations of parents for engaging their children in shadow education and its significant impacts. In addition, the research highlighted the relationship between parents' socioeconomic status and the accessibility of shadow education for primary grade children. The study has further explored the role of parental educational background in influencing the expansion of shadow education for primary grade children. The findings concluded that the most significant motivation of parents for engaging their primary grade children in shadow education is reducing the screen time of their children.

Abstract Accurate streamflow prediction is crucial for effective water resource management and planning.

JEST eligibility 2025 includes specific qualifications for Ph.D. and Integrated M.Sc./M.Tech-Ph.D. programs in Physics, varying by institute. Check official guidelines.

Abstract Sodium present in NaCl is a fundamental nutrient required for many physiological processes.

A PID controller design using an internal model control (IMC) approach is a well-established method for controller tuning in a DC-DC boost converter. This study introduces an innovative implementation of a novel indirect Internal Model Control (IMC) strategy for PID controller design, tailored specifically for a DC-DC boost converter. While the indirect IMC approach has been documented in prior research, its application to boost converters signifies a substantial contribution to the field. The proposed method simplifies the tuning process by focusing exclusively on the plant shifting parameter ψ, thereby eliminating the need for an IMC filter. Optimal tuning is achieved through the Grey Wolf Optimization (GWO) method, which enhances the controller's stability, robustness, and transient response in the presence of disturbances commonly encountered in boost converter operation. Extensive simulations are performed in a MATLAB Simulink environment to compare the performance of the GWO-based indirect IMC-PID controller with traditional PID and IMC-PID designs. Performance is assessed based on transient response parameters and performance indices, such as IAE, ISE, ITAE, and ITSE. Results reveal that the GWO-optimized indirect IMC-PID controller significantly outperforms conventional controllers, demonstrating enhanced servo and regulatory behaviors.

WB SET Exam Subject List includes 33 subjects for Paper II in the WB SET 2024, scheduled for 15th December 2024. Check here for the subject list, admit card, and more.

Manufacturing sectors, including automotive, aerospace, military, and aviation, are paying close attention to the increasing need for composite materials with better characteristics. Composite materials are significantly used in industry owing to their high-quality, low-cost materials with outstanding characteristics and low weight. Hence, aluminum-based materials are preferred over other traditional materials owing to their low cost, great wear resistance, and excellent strength-to-weight ratio. However, the mechanical characteristics and wear behavior of the Al-based materials can be further improved by using suitable reinforcing agents. The various reinforcing agents, including whiskers, particulates, continuous fibers, and discontinuous fibers, are widely used owing to enhanced tribological and mechanical behavior comparable to bare Al alloy. Further, the advancement in the overall characteristics of the composite material can be obtained by optimizing the process parameters of the processing approach and the amount and types of reinforcement. Amongst the various available techniques, stir casting is the most suitable technique for the manufacturing of composite material. The amount of reinforcement controls the porosity (%) of the composite, while the types of reinforcement identify the compatibility with Al alloy through improvement in the overall characteristics of the composites. Fly ash, SiC, TiC, Al2O3, TiO2, B4C, etc. are the most commonly used reinforcing agents in AMMCs (aluminum metal matrix composites). The current research emphasizes how different forms of reinforcement affect AMMCs and evaluates reinforcement influence on the mechanical and tribo characteristics of composite material.

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