Chandra Shekhar, Amit Gupta, Madhu Jain and Neeraj Kumar
The purpose of this paper is to present a sensitivity analysis of fault-tolerant redundant repairable computing systems with imperfect coverage, reboot and recovery process.
Abstract
Purpose
The purpose of this paper is to present a sensitivity analysis of fault-tolerant redundant repairable computing systems with imperfect coverage, reboot and recovery process.
Design/methodology/approach
In this investigation, the authors consider the computing system having a finite number of identical working units functioning simultaneously with the provision of standby units. Working and standby units are prone to random failure in nature and are administered by unreliable software, which is also likely to unpredictable failure. The redundant repairable computing system is modeled as a Markovian machine interference problem with exponentially distributed failure rates and service rates. To excerpt the failed unit from the computing system, the system either opts randomized reboot process or leads to recovery delay.
Findings
Transient-state probabilities have been determined with which the authors develop various reliability measures, namely reliability/availability, mean time to failure, failure frequency, and so on, and queueing characteristics, namely expected number of failed units, the throughput of the system and so on, for the predictive purpose. To spectacle the practicability of the developed model, a numerical simulation, sensitivity analysis and so on for different parameters have also been done, and the results are summarized in the tables and graphs. The transient results are helpful to analyze the developing model of the system before having the stability of the system. The derived measures give direct insights into parametric decision-making.
Social implications
The conclusion has been drawn, and future scope is remarked. The present research study would help system analyst and system designer to make a better choice/decision in order to have the economical design and strategy based on the desired mean time to failure, reliability/availability of the systems and other queueing characteristics.
Originality/value
Different from previous investigations, this studied model provides a more accurate assessment of the computing system compared to uncertain environments based on sensitivity analysis.
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Chandra Shekhar, Madhu Jain, Ather Aziz Raina and Javid Iqbal
The purpose of this paper is to study the performance metrics of redundant repairable machining system which is applicable in various systems like computer and communication…
Abstract
Purpose
The purpose of this paper is to study the performance metrics of redundant repairable machining system which is applicable in various systems like computer and communication system, manufacturing and production system, etc.
Design/methodology/approach
In the present investigation, the authors develop Markov model for the system consisting of identical active operating machines which are prone to breakdown. The operating machines are under the care of one permanent repair facility that provides time-sharing basis repair services. The maintenance is facilitated with the provision of standby machines of mixed type and permanent as well as additional repair facility. From the economic point of view, F-policy and N-policy to control the service and arrival of failed machines effectively are included.
Findings
For the performance analysis of the system in long run, the authors compute steady-state probabilities using product-type solution method recursively. Sensitivity analysis is performed numerically for various parameters by developing code in MATLAB.
Social implications
The performance prediction done may be helpful for the system designers and decision makers for the improvement of the existing machining systems in various industries.
Originality/value
Markovian model for the performance prediction of fault tolerant multi-identical operating and standby machines redundant system is developed in generic frameworks by incorporating many noble features which were not all taken together by other researchers working on the same lines. The key concepts incorporated for the modeling of the concerned system is: F-policy, N-policy, time-sharing, and sensitivity analysis of availability and cost function.
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The role of social networks is central to the phenomenon of employment and ownership in ethnic businesses, ethnic enclaves, and more generally ethnic economies. Social capital…
Abstract
The role of social networks is central to the phenomenon of employment and ownership in ethnic businesses, ethnic enclaves, and more generally ethnic economies. Social capital within migrant or co-ethnic social networks is generally viewed as an aid to niche employment, in other words as processes of network inclusion. This article examines both processes of inclusion and exclusion in the social networks of Asian Indian migrants in and outside of ethnic economies. Evidence from the life histories of these migrants in New York and London allows us to see the role of social networks in producing cooperation and conflict within modes of economic inclusion and exclusion.
International advertisers up to now continue to be confronted withthe question of whether to standardize or adapt their commercialmessages. This debate over the standardization…
Abstract
International advertisers up to now continue to be confronted with the question of whether to standardize or adapt their commercial messages. This debate over the standardization versus adaptation issue has involved both advertising practitioners and academicians interested in transnational advertising issues for at least the past four decades. There are three schools of thought regarding international advertising: standardization, adaptation, and the contingency perspective. Aims to review and contrast the perspectives of practitioners (ad agencies as well as clients) and academicians to this problem over the past 40 years. Observes interesting differences over this time frame, both within each of the two groups and between them. Finds practitioners to have alternated between the adaptation and standardization approaches over the four decades with a trend towards standardization, while academicians have mostly advocated the adaptation approach over the 40 years examined.
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Sofiya Bano and Sandhya Pillai
The purpose of this paper is to prepare calcium oxide (CaO) nanoparticles by green synthesis technique and study its structural, morphological and optical properties. The prepared…
Abstract
Purpose
The purpose of this paper is to prepare calcium oxide (CaO) nanoparticles by green synthesis technique and study its structural, morphological and optical properties. The prepared samples were calcined at, 200°C, 300°C and 500°C, and the variation in the properties at different temperatures were investigated.
Design/methodology/approach
Green approach has been used in the present work to synthesise the CaO nanoparticles using Murraya Koenigii leaf (curry leaves) extract as a capping agent. This technique involves the use of nontoxic reagents and natural products derived from various parts of plants.
Findings
Studies reveal that CaO nanoparticles with good optical properties can be synthesized successfully by green approach. The optical absorbance spectra show a broad absorption peak around 400–500 nm. FTIR studies confirm the presence of different functional groups that help in the stabilization of CaO nanoparticles. PL emission spectra show a high intensity emission peak at around 231 nm in addition to peaks at 375 nm and 400 nm. XRD studies show planes of CaO cubic phase. SEM images show a nonuniform distribution of spherical particles along with some clusters. EDX spectra confirm the presence of calcium and oxygen.
Practical implications
CaO nanoparticles have wide applications in optical devices as well as in phototherapy. It is thus interesting to devise new and eco-friendly techniques to synthesise these nanoparticles to suit these applications.
Originality/value
This work would provide a new insight into the preparation of different metal oxide nanoparticles by a very simple and cost-effective green technique without the use of toxic reagents.
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Purpose – This work offers an investigation of the planning and implementation of climate-adaptation and vulnerability-reduction strategies in coastal mega-cities of the Global…
Abstract
Purpose – This work offers an investigation of the planning and implementation of climate-adaptation and vulnerability-reduction strategies in coastal mega-cities of the Global South, utilizing Kolkata, India, as a case study. This research is designed to identify factors that aid the implementation of climate-centered action in resource-constrained environments of developing countries and provide a set of policy guidelines reflecting best practices.
Methodology/approach – This work draws principally upon analysis of semistructured field interviews conducted in Kolkata, India, during December 2010 and January 2011. The findings are informed by additional data sources as well, including field observations, informal dialogues and meetings, and a review of secondary literature.
Findings – This work identifies several key success factors, including organizational restructuring, resource redistribution, technological innovation, use of external consultants, coupling of climate and development projects, and integration of climate approaches into infrastructure projects.
Research limitations – This research draws upon Kolkata as a case study; thus the work's broader applicability and utility depend on the similarities between the situation in Kolkata and that of other urban areas. As a local study, this work may also offer fewer insights for regional and national policy.
Originality and value – This work fills a timely, unmet need for a greater understanding of climate-adaptation action in the context of cities of the developing world. The extensive use of personal interviews provides unique insights into the minds of planning officials and professionals and draws upon their practical experience to draw lessons for a wide range of similar environments.
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Pawan Whig and Sandeep Kautish
Purpose: The COVID-19 pandemic is the most severe threat we have faced since World War II. So far, there have been about 5 million recorded cases, with over 300,000 fatalities…
Abstract
Purpose: The COVID-19 pandemic is the most severe threat we have faced since World War II. So far, there have been about 5 million recorded cases, with over 300,000 fatalities globally. The epidemic is also wreaking havoc on the corporate world. People are losing their jobs and money, and no one knows when normalcy will return. So, addressing the VUCA Leadership Strategies Model is important to get more insight into this topic.
Need for the Study: According to the International Labor Organization, the pandemic might cost 195 million jobs. Even when the immediate impacts wear off, the long-term economic impact will reverberate for years. All four volatile, unpredictable, complex, and ambiguous (VUCA) characteristics apply to the issues we confront due to the coronavirus.
Methodology: Changes caused by COVID-19 occur daily, and are unpredictable, dramatic, and quick. No one can predict precisely when the epidemic will end or when a treatment or immunisation will be available. The pandemic impacts many parts of society, including health care, business, the economy, and social life. There is no ‘best practice’ that enterprises may utilise to tackle the pandemic’s issues. The VUCA leadership strategy models will be discussed and compared in this research study.
Findings: In this moment of transition, leaders must adhere to their fundamental values, core purpose, and ambition for big, hairy, and audacious goals.
Practical Implications: In this chapter, VUCA leadership strategy models will be discussed in detail for pre- and post-pandemic scenarios and their impact on different sectors, which will be very important for researchers in the same field.
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The study aims to identify the trends in the scholarly works on investors preference toward sustainable investments by synthesizing their knowledge structures.
Abstract
Purpose
The study aims to identify the trends in the scholarly works on investors preference toward sustainable investments by synthesizing their knowledge structures.
Design/methodology/approach
A systematic search approach using PRISMA protocol on the Scopus database was used to generate a sample of 403 publications for the purpose of bibliometric analysis. The study performed a range of analyses, including three-field plot analysis, thematic mapping and cluster analysis using the VOSviewer and Biblioshiny software.
Findings
The key findings comprise the identification of four clusters within the subject, namely, corporate social responsibility and environmental, social and governance (ESG) investing, ethical investing, green finance and socially responsible investments. This study offers a clear picture of the publishing advancement and research diversification of four selected clusters' research themes, and cluster subthemes.
Practical implications
The research reveals the social and intellectual structure of the field, which provides the future researchers an insights into emerging themes and provides them opportunities for collaboration as well. The outcomes of the research hold significance for policymakers, governing bodies, aspiring scholars, advocates for the environment and investors. It offers an insightful framework for implementing sustainable practices, balancing profits, and environmental risks and creating value from environmentally conscious research and practice.
Originality/value
The future direction and extensiveness of research work have been explored using the themes generated. To the best of the authors’ knowledge, this study, which combines the VOSviewer and Biblioshiny tools, is likely the first attempt to provide a thorough bibliometric analysis in the research sphere of investors preferences toward sustainable investments.
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M. Anil Ramesh and Madhusudan Kumar Kota
COCO TANG India is an innovation-driven company. It takes inspiration from the humble coconut water that all of us are very familiar with and have drunk right from our childhood…
Abstract
COCO TANG India is an innovation-driven company. It takes inspiration from the humble coconut water that all of us are very familiar with and have drunk right from our childhood. The founders of the company, Dr Neelima, a dentist by profession and her husband Chaitanya who is a pharmacist have hit upon the idea of a coconut-based drink quite by accident.
When Dr Neelima was pregnant with her first child, the doctor advised her to take fresh coconut water. It was then that Dr Neelima discovered that fresh coconut water was a paradox, the water from a tender coconut is supposed to be fresh but in many cases is not as fresh as it should be. Coconuts are harvested from remote farms in Andhra Pradesh and sent to Hyderabad. And to top it all, the nutrition value of the coconut past its ideal window of consumption leaves a lot to desire. The price factor too is a dampener. It costs Rs. 25 to have tender coconut water in a metropolis like Hyderabad.
Dr Neelima and her husband developed the product idea from their search for a nutritious, healthy drink. Fresh, tender coconut pulp-based shakes, packed with nutrition, taste, health and at the same time make an aspirational product for the young, bubbly and restless youth of India.
This case deals with the problems, the trials and tribulations that these young first-time entrepreneurs faced and details the marketing efforts the young company is putting into survive in the dog eat dog world of fruit drink industry.
The case details the specific marketing-related problems the company faces and examines what the promoters are doing to overcome these problems, specifically related to the four Ps, that is, product, price, place and promotion. It looks in depth at the innovative marketing practices that COCO TANG India is deploying, including the use of the social media that enabled the COCO TANG India’s founder to win Junior Chamber International – Business Excellence Award for the year 2017–2018.
COCO TANG India is also the recipient of the Telugu book of records ‘certificate of national record’ as being the first brand to introduce Tender Coconut-based Mocktails and Milkshakes (A1).