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1 – 10 of 12Ganesh Babu Katam, Veeresh Babu A., Madhu Murthy K. and Ganesh S. Warkhade
This study aims to find a new alternate source for biodiesel conversion. The alternate source must be easily available, and it should give more oil yield than available edible…
Abstract
Purpose
This study aims to find a new alternate source for biodiesel conversion. The alternate source must be easily available, and it should give more oil yield than available edible, inedible sources. To meet the fuel demand in the transportation sector with edible oil-based biodiesel causes food versus fuel crisis. In addition to this, it increases NOx and CO2 in the environment.
Design/methodology/approach
The present paper reviews the comparison of algae oil yield, fatty acid composition and its biodiesel properties’ effect on diesel engine characteristics.
Findings
Algae were the only source to fulfil fuel demand because its oil and biodiesel yield is higher than other sources. Algae can grow by capturing carbon dioxide from the environment, and its fatty acid composition is more suitable to run diesel engines.
Originality/value
There is an improvement in engine performance–emission tradeoff with algal biodiesel.
Ganesh Rupchand Gawale and Naga Srinivasulu G.
Homogeneous charge compression ignition (HCCI) engine is an advanced combustion method to use alternate fuel with higher fuel economy and, reduce NOX and soot emissions. This…
Abstract
Purpose
Homogeneous charge compression ignition (HCCI) engine is an advanced combustion method to use alternate fuel with higher fuel economy and, reduce NOX and soot emissions. This paper aims to investigate the influence of ethanol fraction (ethanol plus gasoline) on dual fuel HCCI engine performance.
Design/methodology/approach
In this study, the existing CI engine is modified into dual fuel HCCI engine by attaching the carburetor to the inlet manifold for the supply of ethanol blend (E40/E60/E80/E100). The mixture of ethanol blend and the air is ignited by diesel through a fuel injector into the combustion chamber at the end of the compression stroke. The experiments are conducted for high load conditions on the engine i.e. 2.8 kW and 3.5 kW maximum output power for 1,500 constant rpm.
Findings
It is noticed from the experimental results that, with an increase of ethanol in the blends, ignition delay (ID) increases and the start of combustion is retarded. It is noticed that E100 shows the highest ID and low in-cylinder pressure; however, E40 shows the lowest ID compared to higher fractions of ethanol blends. An increase in ethanol proportion reduces NOX and smoke opacity but, HC and CO emissions increase compared to pure diesel mode engine. E100 plus diesel dual-fuel HCCI engine shows the highest brake thermal efficiency compared to remaining ethanol blends and baseline diesel engine.
Originality/value
This experimental study concluded that E100 plus diesel and E80 plus diesel gave optimum dual fuel HCCI engine performance for 2.8 kW and 3.5 kW rated power, respectively.
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Marc Wouters, Susana Morales, Sven Grollmuss and Michael Scheer
The paper provides an overview of research published in the innovation and operations management (IOM) literature on 15 methods for cost management in new product development, and…
Abstract
Purpose
The paper provides an overview of research published in the innovation and operations management (IOM) literature on 15 methods for cost management in new product development, and it provides a comparison to an earlier review of the management accounting (MA) literature (Wouters & Morales, 2014).
Methodology/approach
This structured literature search covers papers published in 23 journals in IOM in the period 1990–2014.
Findings
The search yielded a sample of 208 unique papers with 275 results (one paper could refer to multiple cost management methods). The top 3 methods are modular design, component commonality, and product platforms, with 115 results (42%) together. In the MA literature, these three methods accounted for 29%, but target costing was the most researched cost management method by far (26%). Simulation is the most frequently used research method in the IOM literature, whereas this was averagely used in the MA literature; qualitative studies were the most frequently used research method in the MA literature, whereas this was averagely used in the IOM literature. We found a lot of papers presenting practical approaches or decision models as a further development of a particular cost management method, which is a clear difference from the MA literature.
Research limitations/implications
This review focused on the same cost management methods, and future research could also consider other cost management methods which are likely to be more important in the IOM literature compared to the MA literature. Future research could also investigate innovative cost management practices in more detail through longitudinal case studies.
Originality/value
This review of research on methods for cost management published outside the MA literature provides an overview for MA researchers. It highlights key differences between both literatures in their research of the same cost management methods.
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N.S. Shashikumar, Madhu Macha, B.J. Gireesha and Naikoti Kishan
In recent years, microfluidics has turned into a very important region of research because of its wide range of applications such as microheat exchanger, micromixers fuel cells…
Abstract
Purpose
In recent years, microfluidics has turned into a very important region of research because of its wide range of applications such as microheat exchanger, micromixers fuel cells, cooling systems for microelectronic devices, micropumps and microturbines. Therefore, in this paper, micropolar nanofluid flow through an inclined microchannel is numerically investigated in the presence of convective boundary conditions. Heat transport of fluid includes radiative heat, viscous and Joule heating phenomena.
Design/methodology/approach
Governing equations are nondimensionalized by using suitable dimensionless variables. The relevant dimensionless ordinary differential systems are solved by using variational finite element method. Detailed computations are done for velocity, microrotation and temperature functions. The influence of various parameters on entropy generation and the Bejan number is displayed and discussed.
Findings
It is established that the entropy generation rate increased with both Grashof number and Eckert number, while it decreased with nanoparticle volume fraction and material parameter. Temperature is decreased by increasing the volume fraction of Ag nanoparticle dispersed in water.
Originality/value
According to the literature survey and the best of the author’s knowledge, no similar studies have been executed on micropolar nanofluid flow through an inclined microchannel with effect of viscous dissipation, Joule heating and thermal radiation.
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Mantasha Firoz, Richa Chaudhary and Madhu Lata
This study was conducted with two main objectives: (1) to examine the prevalence of workplace loneliness in the Indian manufacturing and service sectors (2) to examine the…
Abstract
Purpose
This study was conducted with two main objectives: (1) to examine the prevalence of workplace loneliness in the Indian manufacturing and service sectors (2) to examine the influence of socio-demographic characteristics (age, gender, marital status, nature of the organization, tenure, number of friends at the workplace, and position in the organizational hierarchy) on the feeling of loneliness in the workplace.
Design/methodology/approach
Data were collected from 934 employees working in manufacturing and service sectors across India. Regression analysis was used for hypotheses testing.
Findings
Findings indicated below average level of loneliness in Indian workplace. Significant differences were found in workplace loneliness with respect to age, marital status and number of friends at the workplace. In contrast, gender, nature of organization, position and tenure had no effect on the feeling of workplace loneliness.
Originality/value
This study advances the limited literature on workplace loneliness by identifying its prevalence and socio-demographic determinants in Indian business organizations. It would help HR practitioners in comprehending and dealing with the emerging challenges associated with workplace loneliness.
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Mansi Rastogi, Rupashree Baral and Jasmine Banu
This paper aims to provide relevant knowledge about entrepreneurship and women’s leadership in the Indian context. More specifically, it unleashes the veiled challenges as well as…
Abstract
Purpose
This paper aims to provide relevant knowledge about entrepreneurship and women’s leadership in the Indian context. More specifically, it unleashes the veiled challenges as well as success stories of select women entrepreneurs of a developing country to bridge the gap between entrepreneurship theory and practice. It aims to provide directions to the policymakers, educationists, society and families in creating a conducive environment that is essential for the success of women entrepreneurs.
Design/methodology/approach
With a qualitative case study approach, data were collected from Tamil Nadu, a southern Indian state which has a maximum number of women entrepreneurs. Face-to-face interviews were conducted to explore the supportive as well as challenging dimensions of their entrepreneurial journey.
Findings
Content analysis of the interview transcripts indicated that successful entrepreneurs are opportunity-driven and they focus on innovation, service, generation of wealth and employment. Support from family, especially from fathers or husbands, is as important as the entrepreneurial drive, skills and abilities of an entrepreneur. Success for them is being happy, thriving work, having a happy family, having a great work-life balance and the satisfaction to have served society apart from being independent (economically/ financially). Among India’s societal and cultural realities, women have to conquer many hurdles (both implicit and explicit) in their way concerning the societal attitudes toward women stepping out of the home boundaries and traditional gender role expectations. The silver line is societal attitudes are changing, especially in urban India. There are enough support and encouragement from the family, which helps these women pursue their passion and eventually become a successful leader.
Social implications
The success stories of women will bring a wave of positive developmental change in India by fostering respect for women in a male-dominated society and flashing the importance of women’s entrepreneurship.
Originality/value
This paper provides a new examination of women entrepreneurs that significantly further the debate about the underrepresentation of women in leadership roles, especially in entrepreneurship in an emerging economy context like India. Apart from the deterrents, it aims to highlight the enablers and motivations to choose this unconventional profession.
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S. Das, S. Chakraborty and R. N. Jana
This study aims to expose the flow phenomena and entropy generation during a; magnetohydrodynamic (MHD) Poiseuille flow of water-based nanofluids (NFs) in a porous channel subject…
Abstract
Purpose
This study aims to expose the flow phenomena and entropy generation during a; magnetohydrodynamic (MHD) Poiseuille flow of water-based nanofluids (NFs) in a porous channel subject to hydrodynamic slip and convective heating boundary conditions. The flow caused by the uniform pressure; gradient between infinite parallel plates is considered steady and fully developed. The nanoparticles; namely, copper, alumina and titanium oxide are taken with pure water as the base fluid. Viscous dissipation and Joule heating impacts are also incorporated in this investigation.
Design/methodology/approach
The reduced governing equations are solved analytically in closed form. The physical insights of noteworthy parameters on the important flow quantities are demonstrated through graphs and analyzed elaborately. The thermodynamic analysis is performed by calculating entropy generation; rate and Bejan number. A graphical comparison between solutions corresponding to NFs and regular fluid in the channel is also provided.
Findings
The analysis of the results divulges that entropy generation minimization can be achieved by an appropriate combination of the geometrical and physical parameters of thermomechanical systems. It is reported that ascent in magnetic parameter number declines the velocity profiles, while the inverse pattern is witnessed with augmentation in hydrodynamic slip parameters. The temperature dissemination declines with the growth of Biot numbers. It is perceived that the entropy generation rate lessens with an upgrade in magnetic parameter, whereas the reverse trend of Bejan number is perceived with expansion in magnetic parameter and Biot number. The important contribution of the result is that the entropy generation rate is controlled with an appropriate composition of thermo-physical parameter values. Moreover, in the presence of a magnetic field and suction/injection at the channel walls, the shear stresses at the channel walls are reduced about two times.
Practical implications
In various industrial applications, minimizing entropy generation plays a significant role. Miniaturization of entropy is the utilization of the energy of thermal devices such as micro heat exchangers, micromixers, micropumps and cooling microelectromechanical devices.
Originality/value
An attentive review of the literature discloses that quite a few studies have been conducted on entropy generation analysis of a fully developed MHD Poiseuille flow of NFs through a permeable channel subject to the velocity slip and convective heating conditions at the walls.
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Swathi Kailasam, Sampath Dakshina Murthy Achanta, P. Rama Koteswara Rao, Ramesh Vatambeti and Saikumar Kayam
In cultivation, early harvest offers farmers an opportunity to increase production while decreasing the chances of lower crop production rates, ensuring that the economy remains…
Abstract
Purpose
In cultivation, early harvest offers farmers an opportunity to increase production while decreasing the chances of lower crop production rates, ensuring that the economy remains balanced. The significant reason is to predict the disease in plants and distinguish the type of syndrome with the help of segmentation and random forest optimization classification. In this investigation, the accurate prior phase of crop imagery has been collected from different datasets like cropscience, yesmodes and nelsonwisc . In the current study, the real-time earlier state of crop images has been gathered from numerous data sources similar to crop_science, yes_modes, nelson_wisc dataset.
Design/methodology/approach
In this research work, random forest machine learning-based persuasive plants healthcare computing is provided. If proper ecological care is not applied to early harvesting, it can cause diseases in plants, decrease the cropping rate and less production. Until now different methods have been developed for crop analysis at an earlier stage, but it is necessary to implement methods to advanced techniques. So, the detection of plant diseases with the help of threshold segmentation and random forest classification has been involved in this investigation. This implemented design is verified on Python 3.7.8 software for simulation analysis.
Findings
In this work, different methods are developed for crops at an earlier stage, but more methods are needed to implement methods with prior stage crop harvesting. Because of this, a disease-finding system has been implemented. The methodologies like “Threshold segmentation” and RFO classifier lends 97.8% identification precision with 99.3% real optimistic rate, and 59.823 peak signal-to-noise (PSNR), 0.99894 structure similarity index (SSIM), 0.00812 machine squared error (MSE) values are attained.
Originality/value
The implemented machine learning design is outperformance methodology, and they are proving good application detection rate.
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Atin Sumihartati, Wiah Wardiningsih, Naelly Al Kautsar, Muhammad Permana, Samuel Pradana and Ryan Rudy
The purpose of this study is to explore the potential of Cordyline Australis fibers as an alternate raw material for textile.
Abstract
Purpose
The purpose of this study is to explore the potential of Cordyline Australis fibers as an alternate raw material for textile.
Design/methodology/approach
The water retting method was used to extract the fiber. Cordyline Australis fibers were characterized in terms of the morphology of fibers (fiber cross-sectional and longitudinal), fiber chemical functional groups, tensile strength and elongation, fineness, fiber length, moisture regain and friction coefficient.
Findings
Cordyline Australis fiber strands consist of several individual fibers. At the longitudinal section, the fiber cells appeared as long cylindrical tubes with a rough surface. The cross-section of the Cordyline Australis fibers was irregular but some were oval. The key components in the fibers were cellulose, hemicellulose and lignin. The tensile strength of the fiber per bundle was 2.5 gf/den. The elongation of fibers was 13.15%. The fineness of fiber was 8.35 Tex. The average length of the fibers was 54.72 cm. Moisture Regain for fiber was 8.59%. The friction coefficient of fibers was 0.16. The properties of the fiber showed that the Cordyline Australis fiber has the potential to be produced into yarn.
Originality/value
To the best of the author's knowledge, there is no scientific article focused on the Cordyline Australis fibers. Natural fibers from the leaves of the Cordyline Australis plant could be used as an alternate material for textile.
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A. Roja, B.J. Gireesha and B.C. Prasannakumara
Miniaturization with high thermal performance and lower cost is one of the advanced developments in industrial science chemical and engineering fields including microheat…
Abstract
Purpose
Miniaturization with high thermal performance and lower cost is one of the advanced developments in industrial science chemical and engineering fields including microheat exchangers, micro mixers, micropumps, cooling microelectro mechanical devices, etc. In addition to this, the minimization of the entropy is the utilization of the energy of thermal devices. Based on this, in the present investigation, micropolar nanofluid flow through an inclined channel under the impacts of viscous dissipation and mixed convection with velocity slip and temperature jump has been numerically studied. Also the influence of magnetism and radiative heat flux is used.
Design/methodology/approach
The nonlinear system of ordinary differential equations are obtained by applying suitable dimensionless variables to the governing equations, and then the Runge–Kutta–Felhberg integration scheme is used to find the solution of velocity and temperature. Entropy generation and Bejan number are calculated via using these solutions.
Findings
It is established to notice that the entropy generation can be improved with the aspects of viscous dissipation, magnetism and radiative heat flux. The roles of angle of inclination
Originality/value
Electrically conducting micropolar nanofluid flow through an inclined channel subjected to the friction irreversibility with temperature jump and velocity slip under the influence of radiative heat flux has been numerically investigated.
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