Prabhakaran N. and Sudhakar M.S.
The purpose of this paper is to propose a novel curvilinear path estimation model employing multivariate adaptive regression splines (MARS) for mid vehicle collision avoidance…
Abstract
Purpose
The purpose of this paper is to propose a novel curvilinear path estimation model employing multivariate adaptive regression splines (MARS) for mid vehicle collision avoidance. The two-phase path estimation scheme initially uses the offset (position) value of the front and the mid (host) vehicle to build the crisp model. The resulting crisp model is MARS regressed to deliver a closely aligned actual model in the second phase. This arrangement significantly narrows the gap between the estimated and the true path analyzed using the mean square error (MSE) for different offsets on Next Generation Simulation Interstate 80 (NGSIM I-80) data set. The presented model also covers parallel parking by encompassing the reverse motion of the host vehicle in the path estimation, thereby, making it amicable for real-road scenarios.
Design/methodology/approach
The two-phase path estimation scheme initially uses the offset (position) value of the front and the mid (host) vehicle to build the crisp model. The resulting crisp model is MARS regressed to deliver a closely aligned actual model in the second phase.
Findings
This arrangement significantly narrows the gap between the estimated and the true path studied using MSE for different offsets on real (Next Generation Simulation-NGSIM) data. The presented model also covers parallel parking by encompassing the reverse motion of the host vehicle in the path estimation. Thereby, making it amicable for real-road scenarios.
Originality/value
This paper builds a mathematical model that considers the offset and host (mid) vehicles for appropriate path fitting.
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Izabela Simon Rampasso, Vitor William Batista Martins, Milena Pavan Serafim, Carla Kazue Nakao Cavaliero, Osvaldo L. Gonçalvez Quelhas, Walter Leal Filho and Rosley Anholon
The seventh United Nations' Sustainable Development Goal (SDG 7) is broadly characterised by ensuring affordable and clean energy for all. Considering the need for research…
Abstract
Purpose
The seventh United Nations' Sustainable Development Goal (SDG 7) is broadly characterised by ensuring affordable and clean energy for all. Considering the need for research associated with SDGs in developing countries, the Brazilian economy importance and its energy matrix, the purpose of this study is to evaluate how Brazil has been acting in favour of 7th SDGs targets.
Design/methodology/approach
The methodological strategy used was a survey conducted with 42 energy planning specialists who know the Brazilian reality. Data were analysed via averages and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) technique.
Findings
The results show that, in general, the actions taken by Brazil to achieve the goals related to SDG 7 have been developed in a simply and punctually form, needing to move considerably towards developing more planned activities; with this, satisfactory and consolidated results are expected on a national scale.
Originality/value
The information presented can significantly contribute to the broadening of debates associated with sustainable development and energy planning, for both academic and political-economic spheres. Information present here can support future more profound studies, and these, in turn, support the Brazilian government in better actions to achieve the SDG 7 targets.
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The case illustrates an entrepreneurial voyage and venture creation and through it helps in identifying the reasons and causes for that venture's failure. It also enables…
Abstract
The case illustrates an entrepreneurial voyage and venture creation and through it helps in identifying the reasons and causes for that venture's failure. It also enables discussion on the importance of planning a venture, more importantly; financing, managing, growing, and ending a venture and on how to avoid the pitfalls that befall such enterprises. This case can be used in Entrepreneurship courses as well as MBA, PGP and Executive Education programmes on Entrepreneurship.
Isabel Moura, Caroline Dominguez and João Varajão
The purpose of this research is twofold: identify and gain a better insight on factors that can influence high performance of Information Systems (IS) project teams from the…
Abstract
Purpose
The purpose of this research is twofold: identify and gain a better insight on factors that can influence high performance of Information Systems (IS) project teams from the perspective of IS professionals (i.e. team members and leaders), and thus contribute to the general discussion on high-performance project teams; and offer both IS project team members and their project managers some feedback on how to build and manage teams more constructively and to enhance team performance in today’s demanding business environment.
Design/methodology/approach
The authors used an exploratory case study of a small-size holding company and a qualitative analysis of the data to address the research questions.
Findings
Results show a set of perceived factors that can influence high team performance in IS projects. Participants’ perceptions barely coincide. For instance, mutual trust was the only factor suggested as facilitating high team performance by 5 participants (out of 13). Differences may be because of participants’ characteristics (e.g. time on the job). All perceived factors are classified in the literature as nontechnical (i.e. having to do with behavioral and/or socio-organizational matters of project management).
Originality/value
This paper is among the very few empirical studies consolidating knowledge on high-performance IS project teams (e.g. it is still unclear if there are IS project team-specific factors that influence high performance). For the highly technical IS industry, this study came across human-centric factors transversal to different project teams.
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Isabel Moura, Caroline Dominguez and João Varajão
The main aim of this study is to contribute to the discussion on the factors that can influence the high performance of information systems (IS) project team members, from the…
Abstract
Purpose
The main aim of this study is to contribute to the discussion on the factors that can influence the high performance of information systems (IS) project team members, from the individual perspective. This study also allows both IS project team members and their managers to have a thorough picture of high-performing project teams, helping them improve team design, management and performance in today's demanding business environment.
Design/methodology/approach
To address the research questions, the authors carried out an exploratory case study of a small-sized holding company and a qualitative analysis of the data.
Findings
Results show a set of perceived factors that can influence (facilitate/hinder) the high performance of IS project team members. “Proper reward systems” was the most mentioned facilitating factor. “Negative affectivity” and “Lack of competence” were the two most referred as hindering factors. Most of the perceived factors are classified in the literature as non-technical.
Originality/value
Besides being among the very few empirical studies consolidating knowledge on the high performance of IS project team members, this paper extends the authors' previous research (done at the team level) to the individual team member level (as opposed to the team or organizational levels). In spite of IS being a highly technical industry, this study came across mostly human-centered factors transversal to different professionals (IS and non-IS) involved in project teams.
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Mohd Danish Siddiqi, Sudhakar Kumar Chaubey and Aliya Naaz Siddiqui
The central idea of this research article is to examine the characteristics of Clairaut submersions from Lorentzian trans-Sasakian manifolds of type (α, β) and also, to enhance…
Abstract
Purpose
The central idea of this research article is to examine the characteristics of Clairaut submersions from Lorentzian trans-Sasakian manifolds of type (α, β) and also, to enhance this geometrical analysis with some specific cases, namely Clairaut submersion from Lorentzian α-Sasakian manifold, Lorentzian β-Kenmotsu manifold and Lorentzian cosymplectic manifold. Furthermore, the authors discuss some results about Clairaut Lagrangian submersions whose total space is a Lorentzian trans-Sasakian manifolds of type (α, β). Finally, the authors furnished some examples based on this study.
Design/methodology/approach
This research discourse based on classifications of submersion, mainly Clairaut submersions, whose total manifolds is Lorentzian trans-Sasakian manifolds and its all classes like Lorentzian Sasakian, Lorenztian Kenmotsu and Lorentzian cosymplectic manifolds. In addition, the authors have explored some axioms of Clairaut Lorentzian submersions and illustrates our findings with some non-trivial examples.
Findings
The major finding of this study is to exhibit a necessary and sufficient condition for a submersions to be a Clairaut submersions and also find a condition for Clairaut Lagrangian submersions from Lorentzian trans-Sasakian manifolds.
Originality/value
The results and examples of the present manuscript are original. In addition, more general results with fair value and supportive examples are provided.
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R. Venkatesakumar, Sudhakar Vijayakumar, S. Riasudeen, S. Madhavan and B. Rajeswari
The star rating summarises the review content and conveys the message faster than other review components. Star ratings influence helpfulness of the reviews, and extreme reviews…
Abstract
Purpose
The star rating summarises the review content and conveys the message faster than other review components. Star ratings influence helpfulness of the reviews, and extreme reviews are considered as less helpful in the decision process. However, literature has rarely addressed variations in star ratings across product categories and variations between two online retailers. In this paper, the authors have compared the distribution of star ratings across 11 products and among the retailers.
Design/methodology/approach
Online reviews for 11 product categories have collected, and the authors compared the distribution of star ratings across 11 products and retailers. Correspondence analysis has been applied to show the association between star ratings and product categories for the e-retail firms.
Findings
The Amazon site contains proportionately more number of 1-star rated reviews than Flipkart. In Amazon reviews, few product categories are closely associated with 1-star and 2-star reviews, whereas no product categories are closely associated with 1-star and 2-star reviews in Flipkart reviews. The results indicate two distinct communication strategies followed by the firms in managing online consumer reviews.
Research limitations/implications
The authors did not analyse data across demographic details because of access restriction policies of the websites.
Practical implications
Understanding the distribution of review characteristics will improve the consumer’s decision-making ability and using online review content judiciously.
Social implications
This study’s results show significant insights on online retailing by providing cues in using shopping sites and online review characteristics of two prominent retailers.
Originality/value
This paper has brought out a distinct distribution pattern of online review between Amazon and Flipkart. Amazon allows a higher degree of negative contents, whereas Flipkart allows more number of positive reviews.
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Corporate governance; General management; Strategy
Abstract
Subject area
Corporate governance; General management; Strategy
Study level/applicability
Post Graduate/MBA
Case overview
Tata Group is a conglomerate having 29 listed companies with consolidated revenues of $103bn in FY2016. On October 24, 2016, Cyrus Mistry, chairman of the group has been replaced in an unceremonious way from this job, in a boardroom coup, without being given any opportunity to explain his case. This news arrived in the media between October 2016 and December 2016 and wide and public debates took place on the corporate governance practices of Tata Group. Mistry’s ouster was attributed to non-performance, unethical practices and non-compliance to Tata culture. This case presents the Tata Group performance before Mistry, at the ouster of Mistry, the major trouble points and the corporate governance activities that took place in this saga at Tata Group. The real losers in this battle were the investors who lost $12bn between October 2016 and December 2016. Many of Tata Group companies’ stocks plunged.
Expected learning outcomes
The students will learn corporate governance, know how a non-listed company control and govern listed entities, know the way performance of a chairman of a company has been evaluated and learn how ethical and cultural issues impact the performance of chairman of a listed company.
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: 11: Strategy
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Sudhakar Kumar Chaubey and Uday Chand De
The authors set the goal to find the solution of the Eisenhart problem within the framework of three-dimensional trans-Sasakian manifolds. Also, they prove some results of the…
Abstract
Purpose
The authors set the goal to find the solution of the Eisenhart problem within the framework of three-dimensional trans-Sasakian manifolds. Also, they prove some results of the Ricci solitons, η-Ricci solitons and three-dimensional weakly
Design/methodology/approach
The authors have used the tensorial approach to achieve the goal.
Findings
A second-order parallel symmetric tensor on a three-dimensional trans-Sasakian manifold is a constant multiple of the associated Riemannian metric g.
Originality/value
The authors declare that the manuscript is original and it has not been submitted to any other journal for possible publication.
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Renjini Girija and Sudhakar Rajagopal
Bond strength is an indicator of the quality of the fusing process. The study's primary purpose is to predict the bond strength using easily measurable variables. This study…
Abstract
Purpose
Bond strength is an indicator of the quality of the fusing process. The study's primary purpose is to predict the bond strength using easily measurable variables. This study focuses on shirting fabrics fused with woven interlinings and changes in bond strength before and after washing.
Design/methodology/approach
This study attempts to model and predict bond strength of fused shirt composites using an initial screening design followed by full factorial design of experiments. After screening out, those found significantly affecting the bond strength are fabric fiber content, interlining areal weight and fusing temperature. This study proposes the regression models explaining the effect of the three variables on bond strength before and after washing the fused composites.
Findings
This study found that heavy interlinings (250 g/sq.m) require higher fusing temperatures than the lighter interlining (225 g/sq.m). After washing, the bond strength of samples fused at high temperatures reduced in some instances. Maintaining a high temperature without considering interlining weight can lower the bond strength after washing the fused composites.
Originality/value
A combination of screening and full factorial DOE is used to analyze and predict bond strength of composites comprising medium-weight shirting fabrics and heavier weight interlinings used in shirts.