Volume 7 | Issue 4 | October-November-December-2019

 Abstract

Labyrinth seals are used to perform sealing around the rotating Parts of various mechanical machineries. Its work is to minimize escape of fluid essentially gases from high pressure area to low pressure area this is process by building of series of labyrinth teeth which are arranged to provide a close clearance gap between the stator and rotor components of the machine, this may cause a pressure drop occurs across each gap. The main aim of this study is to discuss the Optimization of Circular-Grooved Square Cavity Labyrinth Seal and CFD Analysis Based on ANN Modelling. The methodology for developing two semi-theoretical-semi-experimental formulae and linking them with the ANN technique for obtaining the optimal CSLS is described in this paper. It is concluded that the CFD analyses of the optimal seals confirmed the improvements caused by the cavity shape and captured performance parameter trends. The Pr values of 1.6 are found in the best circular-grooved square and triangular cavity labyrinth seals.

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 Keywords

CFD, labyrinth seal, CSLS, ANN modelling, etc.

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Heat transfer enhancement techniques play a vital role in improving the thermal performance and energy efficiency of heat exchangers used in industrial applications. Among passive enhancement methods, twisted tape inserts are widely recognized for their ability to induce swirl flow and increase turbulence intensity within the flow passage. This study presents an experimental and numerical investigation of heat transfer enhancement in a shell-and-tube heat exchanger equipped with twisted tape inserts. Experiments are conducted under steady-state conditions for varying Reynolds numbers to evaluate the thermal and hydraulic performance of the system. Key performance parameters such as the Nusselt number, heat transfer coefficient, pressure drop, and friction factor are experimentally measured and compared with a plain tube configuration. In parallel, a three-dimensional numerical model is developed using computational fluid dynamics (CFD) to simulate fluid flow and heat transfer characteristics inside the heat exchanger. The numerical results are validated against experimental data to ensure accuracy and reliability. The influence of twisted tape geometry on flow behavior, temperature distribution, and turbulence generation is analyzed in detail. Results demonstrate a significant enhancement in heat transfer performance with twisted tape inserts, accompanied by an increase in pressure drop. A comprehensive thermo-hydraulic performance evaluation is carried out to assess the overall effectiveness of the enhancement technique. The combined experimental and numerical findings confirm that twisted tape inserts offer a practical and efficient solution for improving heat exchanger performance in energy-intensive thermal systems.

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 Keywords

Shell-and-tube heat exchanger, Heat transfer enhancement, Twisted tape inserts, Experimental analysis, Numerical simulation, CFD, Nusselt number, Pressure drop, Thermo-hydraulic performance.

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Energy efficiency has become a critical design consideration in embedded systems due to the increasing demand for low-power and portable electronic devices. ARM-based processors are widely adopted in embedded applications because of their reduced power consumption, high performance, and flexible architecture. This paper presents an experimental analysis of energy consumption in an ARM-based embedded system under different operating conditions. The proposed system evaluates power usage by monitoring voltage and current parameters while executing various computational tasks and operating modes such as active, idle, and sleep states. The hardware platform is developed using an ARM-based microcontroller with peripheral interfaces and a regulated power supply unit. Software routines are designed to control task execution and record power-related parameters for analysis. The collected data is used to compare energy consumption across different functional modes and workload conditions. Experimental results demonstrate that significant power savings can be achieved by optimizing operating modes and task scheduling in ARM-based embedded systems. The outcomes of this study provide useful insights for designing energy-efficient embedded applications, particularly in battery-operated and low-power environments. The proposed analysis approach can be effectively applied to industrial automation, portable devices, and embedded monitoring systems.

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 Keywords

ARM Processor, Embedded Systems, Energy Consumption, Power Analysis, Low Power Design, ARM-Based Microcontroller, Energy Efficiency.

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Parental aspirations play a significant role in shaping the academic, emotional, and psychological development of students, especially at the higher secondary level, which is a crucial stage for career decision-making. While positive parental expectations can motivate students to achieve higher academic goals, excessive aspirations and pressure may lead to stress, anxiety, and reduced well-being among students. The present study aims to examine the nature and extent of parental aspirations and pressure experienced by higher secondary level students. It seeks to analyze how parental expectations influence students' academic performance, motivation, self-concept, and emotional adjustment. The study also explores variations in parental pressure based on factors such as gender, academic stream, and family background. The findings of this research are expected to provide valuable insights for parents, teachers, and educational planners to understand the balance between healthy encouragement and undue pressure. The study emphasizes the need for supportive parental involvement that fosters students' academic growth while safeguarding their mental health and overall development.

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"A Study of Parental Aspirations and Pressure among Higher Secondary Level Students."

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This paper offers a scholarly examination of Chetan Bhagat's literary works and their subsequent cinematic adaptations, analyzing their core themes, distinctive narrative styles, and profound socio-cultural impact on contemporary Indian youth. It delves into the intricate process of literary adaptation within Indian Hindi cinema, highlighting the inherent challenges and notable successes encountered during the transition from page to screen. By comparatively analyzing selected novel-to-film adaptations, the report elucidates the nuanced audience reception and the broader cultural significance of Bhagat's oeuvre. The analysis positions Bhagat as a pivotal literary and cultural figure who has democratized English fiction in India while simultaneously sparking crucial societal dialogues through his accessible narratives.

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The Interplay of Narrative and Adaptation: An Examination of Chetan Bhagat's Novels and Its Cinematic Manifestations

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E-governance has emerged as a transformative force to reform government through technology, fundamentally shifting the relationship between citizens and government institutions. This study examines the impact of e-governance initiatives on democratic processes in India, analyzing how digital technologies have enhanced transparency, accountability, and citizen participation while simultaneously presenting new challenges. Through comprehensive analysis of secondary sources, government reports, and policy documents, this research evaluates major e-governance programs including Digital India, Aadhaar, Right to Information (RTI) portals, e-procurement systems, and e-panchayats. The findings reveal that e-governance has significantly improved service delivery, reduced corruption, and enhanced citizen engagement, though challenges persist regarding digital divide, privacy concerns, and implementation gaps. The study concludes that while e-governance has strengthened democratic governance in India, a more inclusive and comprehensive approach is necessary to realize its full potential in bridging the gap between citizens and government.

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 Keywords

E-governance; Democracy; Digital India; Citizen participation; Transparency; Accountability

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Whenever we talk of British critical vision in colonial India we encompass a geo-space which is inhabited not only by the natives but as well as by the members of the ruling class. The latter include the British men and women, the women popularly being called the 'Memsahibs'. One of the distinguishing features of the discursive practice during this epoch is the greater visibility of the white woman and a conscious attempt at inventing stereotypes. The two major cultural constructs which come out of the critical machinery of the period seek to present the memsahib firstly as the stereotype of the 'idle, pleasure-seeking, materialistic and adulterous memsahib' (Sen 20) which was often set up against the normative figures of her virtuous, metropolitan counterpart and secondly inscribing the memsahib as a 'tragic exile shouldering hardships, discomforts, tragedies and making sacrifices equal to any male counterpart in the course of empire building' (Sen 45).

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'Memsahibs'

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The study introduces a finite element formulation to examine how different localized in-plane edge stresses influence the buckling characteristics of interlayer hybrid fiber metal laminates (HFMLs). The panel has been constructed utilizing a plate element, incorporating the influences of rotating inertia and shear deformation. The present findings align with readily available literature, validating the efficacy of the current formulation. This study employs aluminum metal face sheets that are encased in four-layered, symmetric hybrid cross-ply and angle-ply laminate configurations. The integration of carbon and glass epoxy interlayer composite laminates is known as hybrid. Each scheme has analyzed six unique hybrid combinations, and the performance of each hybrid combination is evaluated across different loading scenarios. This study examines the influence of various parameters, such as panel aspect ratio, panel thickness, boundary conditions, and hybrid configurations. Analyzing mode shapes offers a comprehensive examination and clarification of the influence of each parameter.

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Boundary conditions, Aspect ratio, Structural Stability, Symmetric Cross Ply, Symmetric Angle Ply.

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Feminism as a theory has evolved and women's political experiences all over the world have expanded the arena of feminism. Indian feminist theorists after 1975, have been trying to define, redefine and reconceptualise the existing gender relations in the Indian society. Indian feminist analysis of patriarchy and gender is often understood with the participation of women in political and civil rights movements. For example, feminist and gender issues of Indian women in the twentieth century were articulated as a part of women's participation in the Freedom Movement of India. the status of women in different societies of India also different form each other. the existence of a tribal economy, the status of women in the region is very unique from rest part of India. after independence, many ethnic movements emerged in this region where a huge women participation is noticed. thus, the participation of women in the ethnic movements add new political experiences and which pave the way to reanalyse the feminist theorist of Inia in a new light. This paper tries to analyse feminism as a part of ethnic movements of Northeast India.

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 Keywords

North East, ethnic movement, identity question, feminism

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ABSTRACT: India is one of the rapid growing economies of the world through expansion of agriculture, rapid urbanization and industrialization which compels planners to overlook the importance of maintaining a natural balance with needs of continuous growing population of India. The targeted GDP growth rate of Indian 11th and 12th planning was 9% and achievement was almost same as 8% for rapid expansion of agriculture, industrialization and uncontrolled growth of urbanization which is threatening on natural environment. These growth oriented economic development strategies have resulted environmental degradation in India with deleting natural resources, degraded land, soil erosion, disappearing forests, endangered species, dangerous toxins, global warming etc. Therefore, it should be a reasonable compromise between developmental activities and conservation of the environment. India has been adopting some course of action since Rio-declaration to improve environmental degradation, to reduce the loss of biodiversity and emission of greenhouse gases and to go ahead towards sustainable development. The present paper is an attempt to study the recent growth oriented development strategies of India and its impacts on environmental degradation. The paper concludes with some policy reflections and emphasizes the potential importance of natural resources for survival of future generation.

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 Keywords

Key words: Development, Population, Environment, Degradation.

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