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1 – 10 of 18Kumar Neeraj and Jitendra Kumar Das
High throughput and power efficient computing devices are highly essential in many autonomous system-based applications. Since the computational power keeps on increasing in…
Abstract
Purpose
High throughput and power efficient computing devices are highly essential in many autonomous system-based applications. Since the computational power keeps on increasing in recent years, it is necessary to develop energy efficient static RAM (SRAM) memories with high speed. Nowadays, Static Random-Access Memory cells are predominantly liable to soft errors due to the serious charge which is crucial to trouble a cell because of fewer noise margins, short supply voltages and lesser node capacitances.
Design/methodology/approach
Power efficient SRAM design is a major task for improving computing abilities of autonomous systems. In this research, instability is considered as a major issue present in the design of SRAM. Therefore, to eliminate soft errors and balance leakage instability problems, a signal noise margin (SNM) through the level shifter circuit is proposed.
Findings
Bias Temperature Instabilities (BTI) are considered as the primary technology for recently combined devices to reduce degradation. The proposed level shifter-based 6T SRAM achieves better results in terms of delay, power and SNM when compared with existing 6T devices and this 6T SRAM-BTI with 7 nm technology is also applicable for low power portable healthcare applications. In biomedical applications, Body Area Networks (BANs) require the power-efficient SRAM design to extend the battery life of BAN sensor nodes.
Originality/value
The proposed method focuses on high speed and power efficient SRAM design for smart ubiquitous sensors. The effect of BTI is almost eliminated in the proposed design.
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Joy Chowdhury, Angsuman Sarkar, Kamalakanta Mahapatra and Jitendra Kumar Das
The purpose of this paper is to present an improved model based on center potential instead of surface potential which is physically more relevant and accurate. Also, additional…
Abstract
Purpose
The purpose of this paper is to present an improved model based on center potential instead of surface potential which is physically more relevant and accurate. Also, additional analytic insights have been provided to make the model independent and robust so that it can be extended to a full range compact model.
Design/methodology/approach
The design methodology used is center potential based analytical modeling using Psuedo-2D Poisson equation, with ingeniously developed boundary conditions, which help achieve reasonably accurate results. Also, the depletion width calculation has been suitably remodeled, to account for proper physical insights and accuracy.
Findings
The proposed model has considerable accuracy and is able to correctly predict most of the physical phenomena occurring inside the broken gate Tunnel FET structure. Also, a good match has been observed between the modeled data and the simulation results. Ion/Iambipolar ratio of 10^(−8) has been achieved which is quintessential for low power SOCs.
Originality/value
The modeling approach used is different from the previously used techniques and uses indigenous boundary conditions. Also, the current model developed has been significantly altered, using very simple but intuitive technique instead of complex mathematical approach.
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Pragyan Paramita Das, Vishwas Nandkishor Khatri, Rahul Doley, Rakesh Kumar Dutta and Jitendra Singh Yadav
This paper aims to estimate the bearing capacity of a surface strip and circular footings lying on layered sand using numerical limit analysis.
Abstract
Purpose
This paper aims to estimate the bearing capacity of a surface strip and circular footings lying on layered sand using numerical limit analysis.
Design/methodology/approach
Lower and upper bound limit analysis, as well as finite elements and second-order conic programming (SOCP), are used in this analysis. The yield criterion of Mohr-Coulomb is used to model soil behavior. Using this technique, stringent lower and upper bounds on ultimate bearing capacity can be achieved by assuming an associated flow law.
Findings
The obtained results indicate that the exact collapse load is typically being bracketed to within 6% about a mean of both the bounds. The obtained results are compared with the existing literature wherever applicable.
Originality/value
To the best of the authors’ knowledge, no study has used lower and upper bound limit analysis, as well as finite elements and SOCP, to estimate the bearing capacity of a surface strip and circular footings lying on layered sand.
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Jitendra Kumar Singh, Gauri Shenkar Seth, Ghousia Begum and Vishwanath S.
In the present investigation, hydromagnetic boundary layer flow of Walters’-B fluid over a vertical porous surface implanted in a porous material under the action of a strong…
Abstract
Purpose
In the present investigation, hydromagnetic boundary layer flow of Walters’-B fluid over a vertical porous surface implanted in a porous material under the action of a strong external applied magnetic field and rotation is presented. In several industrial applications, the external applied magnetic field is strong enough to produce Hall and ion-slip currents. Thus, the influence of Hall and ion-slip currents is also considered in this analysis. The flow through configuration is generated because of time varying motion of the free-stream and buoyancy action.
Design/methodology/approach
Regular perturbation scheme is used to obtain the solution of the system of coupled partial differential equations representing the mathematical model of the problem. Numerical computation has been performed to notice the change in flow behavior and the numerical results for velocity field, temperature field, species concentration, skin friction, rate of heat and mass transfer are presented through graphs and tables.
Findings
An important fact noticed that the exponential time varying motion of the free-stream induces reverse flow in the direction perpendicular to the main flow. Rising values of the strength of the applied magnetic field give increment in the fluid velocity in the neighbourhood of the vertical surface, this may cause because of the exponential motion of the free-stream. The behaviour of the Darcian drag force is similar as magnetic field on fluid flow.
Originality/value
In literature, very less research works are available on Walters’-B fluid where unsteadiness in the system occurs because of time varying motion of the free-stream. In this paper, the authors have made an attempt to study the action of Hall and ion-slip currents, rotation and external applied magnetic field on hydromagnetic boundary layer flow of Walters’-B fluid over a vertical surface implanted in a porous material.
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Jitendra Kumar Singh, Gauri Shenker Seth and Saikh Ghousia Begum
The purpose of this paper is to present an analytical study on an unsteady magnetohydrodynamic (MHD) boundary layer flow of a rotating viscoelastic fluid over an infinite vertical…
Abstract
Purpose
The purpose of this paper is to present an analytical study on an unsteady magnetohydrodynamic (MHD) boundary layer flow of a rotating viscoelastic fluid over an infinite vertical porous plate embedded in a uniform porous medium with oscillating free-stream taking Hall and ion-slip currents into account. The unsteady MHD flow in the rotating fluid system is generated due to the buoyancy forces arising from temperature and concentration differences in the field of gravity and oscillatory movement of the free-stream.
Design/methodology/approach
The resulting partial differential equations governing the fluid motion are solved analytically using the regular perturbation method by assuming a very small viscoelastic parameter. In order to note the influences of various system parameters and to discuss the important flow features, the numerical results for fluid velocity, temperature and species concentration are computed and depicted graphically vs boundary layer parameter whereas skin friction, Nusselt number and Sherwood number at the plate are computed and presented in tabular form.
Findings
An interesting observation is recorded that there occurs a reversal flow in the secondary flow direction due to the movement of the free stream. It is also noted that a decrease in the suction parameter gives a rise in momentum, thermal and concentration boundary layer thicknesses.
Originality/value
Very little research work is reported in the literature on non-Newtonian fluid dynamics where unsteady flow in the system arises due to time-dependent movement of the plate. The motive of the present analytical study is to analyse the influences of Hall and ion-slip currents on unsteady MHD natural convection flow of a rotating viscoelastic fluid (non-Newtonian fluid) over an infinite vertical porous plate embedded in a uniform porous medium with oscillating free-stream.
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Jitendra Kumar Singh and Srinivasa C.T.
The purpose of this paper is to deal with an unsteady natural convection flow of a rotating fluid past an exponential accelerated vertical plate. The effect of Hall current…
Abstract
Purpose
The purpose of this paper is to deal with an unsteady natural convection flow of a rotating fluid past an exponential accelerated vertical plate. The effect of Hall current, ion-slip and magnetic field is considered. Two types of plate temperature, namely, uniform and ramped temperature are considered to model heat transfer analysis.
Design/methodology/approach
The Laplace transform technique is employed to find the closed form solutions for velocity, temperature and concentration.
Findings
The effects of flow governing parameters on the velocity profile, temperature profile, concentration profile, skin friction, Nusselt and Sherwood numbers are discussed and presented through graphs and tables. It is found that fluid velocity in the primary flow direction decreases with the increase in the magnetic parameter.
Originality/value
First time in the literature, the authors obtained closed form solution to natural convection flow of a rotating fluid past an exponential accelerated vertical plate.
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Syed Modassir Hussain, Rohit Sharma, Manoj Kumar Mishra and Jitendra Kumar Singh
Nanosized honeycomb-configured materials are used in modern technology, thermal science and chemical engineering due to their high ultra thermic relevance. This study aims to…
Abstract
Purpose
Nanosized honeycomb-configured materials are used in modern technology, thermal science and chemical engineering due to their high ultra thermic relevance. This study aims to scrutinize the heat transmission features of magnetohydrodynamic (MHD) honeycomb-structured graphene nanofluid flow within two squeezed parallel plates under Joule dissipation and solar thermal radiation impacts.
Design/methodology/approach
Mass, energy and momentum preservation laws are assumed to find the mathematical model. A set of unified ordinary differential equations with nonlinear behavior is used to express the correlated partial differential equations of the established models, adopting a reasonable similarity adjustment. An approximate convergent numerical solution to these equations is evaluated by the shooting scheme with the Runge–Kutta–Fehlberg (RKF45) technique.
Findings
The impression of pertinent evolving parameters on the temperature, fluid velocity, entropy generation, skin friction coefficients and the heat transference rate is explored. Further, the significance of the irreversibility nature of heat transfer due to evolving flow parameters are evaluated. It is noted that the heat transference rate performance is improved due to the imposition of the allied magnetic field, Joule dissipation, heat absorption, squeezing and thermal buoyancy parameters. The entropy generation upsurges due to rising magnetic field strength while its intensification is declined by enhancing the porosity parameter.
Originality/value
The uniqueness of this research work is the numerical evaluation of MHD honeycomb-structured graphene nanofluid flow within two squeezed parallel plates under Joule dissipation and solar thermal radiation impacts. Furthermore, regression models are devised to forecast the correlation between the rate of thermal heat transmission and persistent flow parameters.
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Manoj Kumar Singh, Harish Kumar, M.P. Gupta and Jitendra Madaan
The purpose of this paper is to identify and build a hierarchy of the factors influencing competitiveness of electronics manufacturing industry (EMI) at the industry level and…
Abstract
Purpose
The purpose of this paper is to identify and build a hierarchy of the factors influencing competitiveness of electronics manufacturing industry (EMI) at the industry level and apply the interpretive structural modeling, fuzzy Matriced’ Impacts Croisés Multiplication Appliquée á UN Classement (i.e. the cross-impact matrix multiplication applied to classification; MICMAC) and analytic hierarchy process (AHP) approaches. These factors have been explained with respect to managerial and government policymakers’ standpoint in Indian context.
Design/methodology/approach
This study presents a hierarchy and weight-based model that demonstrates mutual relationships among the significant factors of competitiveness of the Indian EMI.
Findings
This study covers a wide variety of factors that form the bedrock of the competitiveness of the EMI. Interpretive structural modeling and fuzzy MICMAC are used to cluster the influential factors of competitiveness considering the driving and dependence power. AHP is used to rank the factors on the basis of weights. Results show that the “government role” and “foreign exchange market” have a significantly high driving power. On the other hand, the “capital resource availability” and “productivity measures” come at the top of the interpretive structural modeling hierarchy, implying high dependence power.
Research limitations/implications
The study has strong practical implications for both the manufacturers and the policymakers. The manufacturers need to focus on the factors of competitiveness to improve performance, and at the same time, the government should come forward to build a suitable environment for business in light of the huge demand and frame suitable policies.
Practical implications
The lackluster performance of the industry is because of the existing electronics policies and environmental conditions. The proposed interpretive structural modeling and fuzzy MICMAC and AHP frameworks suggest a better understanding of the key factors and their mutual relationship to analyze competitiveness of the electronics manufacturing industry in view of the Indian Government’s “Make in India” initiatives.
Originality/value
This paper contributes to the industry level competitiveness and dynamics of multi-factors approach and utilize the ISM–fuzzy MICMAC and AHP management decision tool in the identification and ranking of factors that influence the competitiveness of the EMI in the country.
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This study aims to investigate the correlation between public trust and the performance of collaborative e-governance, with a particular emphasis on trust in government…
Abstract
Purpose
This study aims to investigate the correlation between public trust and the performance of collaborative e-governance, with a particular emphasis on trust in government institutions as the central aspect of inquiry. It assesses how public trust influences e-governance performance through the lens of good governance principles, encompassing evaluations of trust in government services and trust in the technological infrastructure used for citizen services.
Design/methodology/approach
The research framework is based on a thorough literature review, pilot study and practical experience. An empirical survey was conducted using a structured questionnaire to collect primary data from individuals who have used specific e-governance projects. To conduct the survey, the author used the snowball sampling method both offline and online. The author analysed the data using SmartPLS Version 3 to assess the measurement and structural model.
Findings
The study rigorously examines and confirms all formulated hypotheses using robust statistical analyses. Nonetheless, the results underscore the pivotal significance of the reliability and utility of e-governance services in nurturing public trust. Furthermore, the research unveils a troubling concern pertaining to the absence of tailored responses to citizen inquiries, grievances and recommendations, indicating an area of vulnerability in the effort to cultivate public trust.
Research limitations/implications
The research has implications for managers, citizens and researchers. It focuses on public trust in interaction-based collaboration, but researchers may extend it to other forms like content-based collaboration. Policymakers can implement the findings in present and future e-governance projects. Limitations include a moderate sample size, country context, and not assessing other factors that may influence public trust in collaborative e-governance performance.
Originality/value
This study contributes to the existing body of knowledge by exploring the link between good governance, public trust and collaborative e-governance performance. It focuses on projects that require physical visits to government offices, where public trust has been impacted. This study is unique because it assesses public trust in collaborative e-governance, specifically in the context of India, where there is limited prior research on this topic exists.
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This case is about SEWA – the Chikankari concept of Runa Banerjee, which started with the objectives of skill development, training and improving the livelihood conditions of…
Abstract
Subject area
This case is about SEWA – the Chikankari concept of Runa Banerjee, which started with the objectives of skill development, training and improving the livelihood conditions of Chikankari artisans by encouraging self-sustenance through employment opportunities and entrepreneurial ventures. In recent years, SEWA has been working for export and domestic orders and has been retailing through exhibitions and its only outlet in Hazratganj, Lucknow. The company over the years due to its social initiatives and good quality Chikankari work has become a known brand name but is also facing stiff competition from the organized market, various other retailers and substitute products. The case discusses the competitive and the market forces with respect to the brand.
Study level/applicability
The case has been designed for the students of business administration who have completed their basic module on marketing. The students need to have understood the concept of marketing mix, competition, segmentation, targeting and the basics of marketing strategy to ensure effective learning.
Case overview
The case discusses the competitive and market analysis for Lucknow-based firm SEWA in focus. SEWA started as a firm indulged in social upliftment of Chikankari workers which was achieved through trainings in skill upgradation, design and technical development, entrepreneurship development and linkages for social security. The various types of competition, such as direct competition from local retailers, secondary competition from unorganized markets of Chauk and Nazirabad and indirect competition from substitute products, have been studied and analysed. The problem of similar brand names adopted by various Chikankari retailers selling similar products has been highlighted as a major threat in the case. SEWA has adopted the strategy of product innovation to attain competitive advantage. SEWA has developed various traditional and contemporary designs which have fared well in the market.
Expected learning outcomes
Familiarizing management students with the concept of competitive analysis with the case of SEWA, Lucknow., and acquainting students with the basic understanding of market forces and competition with a firm supporting a traditional art form in focus, are the expected learning outcomes.
Supplementary materials
Teaching notes are available for educators only. Please contact your library to gain login details or email support@emeraldinsight.com to request teaching notes.
Subject code
CSS 8: Marketing.
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