Proposal of a radially differential type magnetic-geared motor

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kazuaki Takahara ◽  
Katsuhiro Hirata ◽  
Noboru Niguchi ◽  
Hironori Suzuki ◽  
Hajime Ukaji
Keyword(s):  
Mathematical Model ◽  
Gear Ratio ◽  
Conventional Model ◽  
Content Type ◽  
Operational Principle ◽  
Proposed Model ◽  
Differential Type ◽  
Conventional Models ◽  
The Relationship ◽  
Maximum Transmission

Purpose This paper aims to propose a new magnetic-geared motor (MGM) which can easily increase the gear ratio up to approximately several hundred. The operational principle is described, and the relationship between the maximum transmission torques of each layer of the differential harmonic magnetic gear is investigated using a mathematical model and finite element method (FEM). Design/methodology/approach The operational principle and maximum transmission torque are described using a mathematical model. The FEM is used to investigate the operational principle and torque characteristics. Findings As the proposed model can realize a larger gear ratio than the conventional model, the torque constant can be approximately 100 times as large as that of the conventional model. Research limitations/implications The proposed and conventional models have the same shape stator, and it is not optimized. Originality/value The relationship between the maximum transmission torques of each layer is described, and this helps the design of a differential type MGM.

Loyalty program in Africa: risk-seeking and risk-averse adventurers

2014 ◽  
Vol 69 (2) ◽  
pp. 137-157 ◽  
Author(s):  
Shogo Mlozi
Keyword(s):  
Consumer Behavior ◽  
Consumer Products ◽  
Loyalty Programs ◽  
Risk Averse ◽  
Loyalty Program ◽  
Content Type ◽  
Risk Seeking ◽  
Proposed Model ◽  
First Time ◽  
The Relationship

Purpose – This article aims to test the relationship between expected attractiveness-satisfaction-loyalty for international adventure tourists visiting Tanzania. The proposed model is based on travel consumer behavior theoretical constructs extracted from the literature. Design/methodology/approach – This article aims to test the relationship between expected attractiveness-satisfaction-loyalty for international adventure tourists visiting Tanzania. The proposed model is based on travel consumer behavior theoretical constructs extracted from the literature. Findings – The findings for overall model differed from the moderating factors of high risk, low risk, first-time visit and repeat visit. Also, the results are interesting when satisfaction is tested as a mediator. Practical implications – Practitioners could consider the fact that repeat visits may change tourists’ perceptions toward destination and may even increase their inclination to take on risks. This may impact innovation of consumer products in tourism. Also, policy makers could benefit on how loyalty programs can be developed to increase performance. Originality/value – The study offers specific strategic recommendations toward different groups of tourists (i.e. first-time, repeat visitors, risk averse, risk seeking) and proposes logic for setting up a loyalty program as a long-term strategy for success.

A bi-level mathematical model for logistic management considering the evolutionary game with environmental feedbacks

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Peiman Ghasemi ◽  
Fariba Goodarzian ◽  
Angappa Gunasekaran ◽  
Ajith Abraham
Keyword(s):  
Mathematical Model ◽  
Lagrangian Relaxation ◽  
Evolutionary Games ◽  
Relaxation Method ◽  
Objective Functions ◽  
Content Type ◽  
Medical Centers ◽  
Location Routing ◽  
Proposed Model

PurposeThis paper proposed a bi-level mathematical model for location, routing and allocation of medical centers to distribution depots during the COVID-19 pandemic outbreak. The developed model has two players including interdictor (COVID-19) and fortifier (government). Accordingly, the aim of the first player (COVID-19) is to maximize system costs and causing further damage to the system. The goal of the second player (government) is to minimize the costs of location, routing and allocation due to budget limitations.Design/methodology/approachThe approach of evolutionary games with environmental feedbacks was used to develop the proposed model. Moreover, the game continues until the desired demand is satisfied. The Lagrangian relaxation method was applied to solve the proposed model.FindingsEmpirical results illustrate that with increasing demand, the values of the objective functions of the interdictor and fortifier models have increased. Also, with the raising fixed cost of the established depot, the values of the objective functions of the interdictor and fortifier models have raised. In this regard, the number of established depots in the second scenario (COVID-19 wave) is more than the first scenario (normal COVID-19 conditions).Research limitations/implicationsThe results of the current research can be useful for hospitals, governments, Disaster Relief Organization, Red Crescent, the Ministry of Health, etc. One of the limitations of the research is the lack of access to accurate information about transportation costs. Moreover, in this study, only the information of drivers and experts about transportation costs has been considered. In order to implement the presented solution approach for the real case study, high RAM and CPU hardware facilities and software facilities are required, which are the limitations of the proposed paper.Originality/valueThe main contributions of the current research are considering evolutionary games with environmental feedbacks during the COVID-19 pandemic outbreak and location, routing and allocation of the medical centers to the distribution depots during the COVID-19 outbreak. A real case study is illustrated, where the Lagrangian relaxation method is employed to solve the problem.

Designing an uncertain bi-objective green leagile capacitated lot sizing problem considering FM/M/C queue system

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Masoud Rabbani ◽  
Soroush Aghamohamadi Bosjin ◽  
Neda Manavizadeh ◽  
Hamed Farrokhi-Asl
Keyword(s):  
Mathematical Model ◽  
Solution Method ◽  
Lot Sizing ◽  
Test Problems ◽  
Content Type ◽  
Queue System ◽  
Proposed Model ◽  
Lot Sizing Problem ◽  
Capacitated Lot Sizing ◽  
To Receive

Purpose This paper aims to present a novel bi-objective mathematical model for a production-inventory system under uncertainty. Design/methodology/approach This paper addresses agile and lean manufacturing concepts alongside with green production methods to design an integrated capacitated lot sizing problem (CLSP). From a methodological perspective, the problem is solved in three phases. In the first step, an FM/M/C queuing system is used to minimize the number of customers waited to receive their orders. In the second step, an effective approach is applied to deal with the fuzzy bi-objective model and finally, a hybrid metaheuristic algorithm is used to solve the problem. Findings Some numerical test problems and sensitivity analyzes are conducted to measure the efficiency of the proposed model and the solution method. The results validate the model and the performance of the solution method compared to Gams results in small size test problems and prove the superiority of the hybrid algorithm in comparison with the other well-known metaheuristic algorithms in large size test problems. Originality/value This paper presents a novel bi-objective mathematical model for a CLSP under uncertainty. The proposed model is conducted on a practical case and several sensitivity analysis are conducted to assess the behavior of the model. Using a queue system, this problem aims to reduce the items waited in the queue to receive service. Two objective functions are considered to maximize the profit and minimize the negative environmental effects. In this regard, the second objective function aims to reduce the amount of emitted carbon.

Sponsoring the football national team

2018 ◽  
Vol 33 (5) ◽  
pp. 625-637 ◽  
Author(s):  
Ana Brochado ◽  
Pedro Dionísio ◽  
Maria Carmo Leal
Keyword(s):  
National Sample ◽  
World Cup ◽  
Content Type ◽  
National Team ◽  
Brand Building ◽  
Proposed Model ◽  
Image Congruence ◽  
Positive Feelings ◽  
Representative National Sample ◽  
The Relationship

Purpose A key concern in sports sponsorship decisions is knowing under what conditions sponsorship can effectively act as a brand building tool. The purpose of this study is to list attributes to use when examining congruency in the sponsorship of national football teams. The second aim was to test whether being a client of the sponsor brand and being involved with the sponsee moderates the relationship between image congruence and sponsorship response. Design/methodology/approach Data were collected on four sponsors of the Portuguese national team, just before the 20th Fédération Internationale de Football Association World Cup. Analyses were conducted on a representative national sample of fans. The research design encompassed a two-step approach. First, qualitative analysis identified the main attributes that fans associate with the national team. In the second quantitative phase, moderated regression analysis was used to test the proposed model. Findings This study confirmed sponsor–sponsee congruence in seven attributes (i.e. national symbol, strength, strong emotions, happiness, optimism, connection and positive feelings) enhances positive brand image and fans’ involvement with the national team moderates this relationship. Positive sponsorship outcomes tend to be higher for sponsors when fans are currently clients of the sponsor brand. Originality/value This study adds to previous research by using mixed methods to study sponsor–sponsee congruence regarding national teams and by testing whether fans being clients of sponsors and being involved with sponsees moderate sponsor–sponsee congruence.

scholarly journals The relationship between favorable conditions for innovation in technology parks, the innovation produced, and companies’ performance

2018 ◽  
Vol 15 (3) ◽  
pp. 286-302 ◽  
Author(s):  
Lucas Bonacina Roldan ◽  
Peter Bent Hansen ◽  
Domingo Garcia-Perez-de-Lema
Keyword(s):  
Organizational Performance ◽  
Analysis Model ◽  
Content Type ◽  
Practical Support ◽  
Proposed Model ◽  
Technology Parks ◽  
Effective Development ◽  
Favorable Conditions ◽  
The Relationship ◽  
Depth Interviews

PurposeInnovation is today considered a competitive differential for improving the performance of companies, and technology parks are seen as environments with favorable conditions for such innovation. The purpose of this study is to develop a framework for analyzing favorable conditions for innovation in technology parks, the innovations produced and organizational performance.Design/methodology/approachTo this end, the authors conducted bibliographic research and in-depth interviews with managers of companies based at the Tecnopuc Science and Technology Park, and managers of the park itself, to establish practical support for previous theoretical findings.FindingsAs a result, a framework was developed to link the favorable conditions for innovation, and organizational performance.Research limitations/implicationsThe analysis model proposed here synthesizes the contributions made by several scholars on the theme, allowing for a more detailed and integrated interpretation of the phenomenon, namely, the ways through which the effective development of innovation takes place in companies residing in technology parks and the contribution of innovation to the specific performance of companies.Practical implicationsThe use of the proposed framework can help direct park managers’ action towards those relationships or activities that prove to be ineffective in achieving desired goals.Originality/valueThe use of the proposed model in empirical surveys will allow for better understanding of the phenomenon involving the features of technology parks and their effects on innovation and the performance of companies installed there, considering that such parks allow them to access resources with lower transaction costs.

How does open innovation affect firms’ innovative performance

2018 ◽  
Vol 12 (4) ◽  
pp. 720-740 ◽  
Author(s):  
Huiping Zhou ◽  
Yanhong Yao ◽  
Huanhuan Chen
Keyword(s):  
Open Innovation ◽  
Hierarchical Regression ◽  
Moderating Effects ◽  
Content Type ◽  
Innovative Performance ◽  
Knowledge Based ◽  
Opportunistic Behaviour ◽  
Proposed Model ◽  
New Finding ◽  
The Relationship

Purpose This paper aims to explore the direct effects of open innovation (OI) on firms’ innovative performance, and to examine the moderating effects of knowledge attributes, including knowledge distance, knowledge embeddedness and partner opportunism on this relationship. Design/methodology/approach Survey data of 247 samples from China were used to test the proposed model through hierarchical regression analysis. Findings The findings indicate that the dimensions of OI are positively related to innovative performance. The results also reveal that knowledge distance positively moderates the relationship between inbound OI and innovative performance, whereas knowledge embeddedness negatively affects that relationship. Knowledge embeddedness negatively affects the relationship between inbound OI and innovative performance, whereas knowledge distance positively moderates that relationship. Thus, a new finding is proposed that knowledge attributes could align effectively with specific OI type to achieve superior innovation outcomes. In addition, the empirical results suggest that partner opportunism plays a negative moderating role on the relationship between outbound OI and innovative performance. Originality/value The proposed view that a firm’s innovation outputs will be superior when its knowledge attributes effectively align with OI enriches studies of the OI context and expands the literature of both the resource-based view and the knowledge-based view. Furthermore, this study provides insights into how OI benefits can be influenced by external contexts from the perspective of partners’ opportunistic behaviour.

scholarly journals Follower emotional intelligence

2019 ◽  
Vol 48 (5) ◽  
pp. 1239-1260
Author(s):  
J. Irudhaya Rajesh ◽  
Verma Prikshat ◽  
Paul Shum ◽  
L. Suganthi
Keyword(s):  
Emotional Intelligence ◽  
Structural Equation ◽  
Theoretical Perspective ◽  
Self Report ◽  
Content Type ◽  
Proposed Model ◽  
One Step ◽  
Cognitive Speed ◽  
The Impact ◽  
The Relationship

Purpose The purpose of this paper is to understand the impact of transformational leadership (TL) on follower emotional intelligence (EI) and examine the potential mediation role played by follower EI in the relationship between TL and follower outcomes (i.e. growth satisfaction in the job and job stress (JS)). Design/methodology/approach Data were obtained through survey using questionnaire collected from 908 employees who worked across six different sectors, i.e. manufacturing, IT, healthcare, hospitality, educational and public services in Southern India. The mediation model proposed in this study was tested using structural equation modelling and bootstrapping method. Findings The relationship between TL and Follower EI was significant. Follower EI was found to partially mediate the relationship between TL and followers’ growth satisfaction in job. Contrary to expectations, the follower EI did not significantly predict JS in this study and hence the follower EI did not mediate in the proposed model. However, follower EI and growth satisfaction in the job jointly mediated the relationship between TL and follower JS fully. Research limitations/implications Self-report bias about supervisors’ TL behaviours and followers’ own EI assessment and collection of data from the mono-source (subordinate self-report) might have impacted the results of this study. Moreover, some items were negatively worded and reverse coded as cognitive speed bumps to restrain the respondent’s tendency to rush through answering the survey questionnaire. Practical implications This study established a partial and joint mediation of follower EI on the relationship between TL and follower outcomes. Basing on these findings, this study highlights the need for the practitioners to better understand the importance of EI training for the leaders in the organisations for obtaining better outcomes in the followers. Social implications The study establishes the fact that the attunement of transformational leaders’ EI and follower EI help leaders as well as followers to guide their behaviour towards positive outcomes. Originality/value This study is among the first to examine the impact of TL on follower EI and the potential mediation of follower EI between TL and follower outcomes. From a theoretical perspective, this study is one step closer to fully understand the intervening process between TL and follower outcomes.

Innovativeness in the context of technological and market dynamism

2017 ◽  
Vol 30 (4) ◽  
pp. 548-568 ◽  
Author(s):  
Job Rodrigo-Alarcón ◽  
Pedro Manuel García-Villaverde ◽  
Gloria Parra-Requena ◽  
María José Ruiz-Ortega
Keyword(s):  
Network Theory ◽  
Interactive Effect ◽  
Interactive Effects ◽  
Network Density ◽  
Critical Aspect ◽  
Content Type ◽  
Proposed Model ◽  
The Relationship ◽  
Positive Effect

Purpose Innovativeness is a critical aspect for the survival and success of the company in the long term. The purpose of this paper is to study how the density of the network in which the company is immersed influences the relationship between environment, dynamism and innovativeness. More specifically, the authors analyse whether the network density acts in a heterogeneous way, worsening or improving the effects of technological and market dynamism on innovativeness, respectively. Design/methodology/approach The empirical study was conducted on a sample of 292 companies in the agri-food industry in Spain. In order to test the proposed model, the authors used partial least squares. Findings The results show that technological dynamism has a positive effect on the generation and development of a firm’s innovativeness. However, market dynamism does not influence innovativeness. The authors also observe that the interactive effects between network density and dynamism are significant, but in a divergent way. Whereas the interactive effect between density and technological dynamism is negative, the interaction between density and market dynamism is positive. Originality/value The main contribution of the study is to show how the level of network density alters the effect of technological and market dynamism on innovativeness. The authors highlight the relevance of network theory to explain the contextual background to innovativeness. The authors also stress the importance of differentiating between the market and technological components of dynamism to further elucidate their effects.

A numerical method for solving the physics-based model of IGBT with all free-carrier injection conditions in the base region

2017 ◽  
Vol 36 (6) ◽  
pp. 1653-1662 ◽  
Author(s):  
Jiajia Chen ◽  
Yuhan Ma ◽  
Shiyou Yang
Keyword(s):  
Mathematical Model ◽  
Numerical Model ◽  
Design Methodology ◽  
Free Carrier ◽  
Carrier Injection ◽  
Base Region ◽  
Content Type ◽  
Insulated Gate Bipolar Transistor ◽  
Proposed Model ◽  
Solution Methodology

Purpose The purpose of this paper is to provide an accurate model and method to simulate the transient performances of an insulated gate bipolar transistor (IGBT) in an arbitrary free-carrier injection condition. Design/methodology/approach A numerical model and method for solving the physics-based model, an ambipolar diffusion equation-based model, of an IGBT is proposed. Findings The results of the proposed model are very close to the tested ones. Originality/value A mathematical model for an IGBT considering all free-carrier injection conditions is introduced, and a numerical solution methodology is proposed.

scholarly journals Linking improvisational behavior to customer satisfaction: the relational dynamics

2019 ◽  
Vol 34 (6) ◽  
pp. 1183-1193 ◽  
Author(s):  
Magnus Hultman ◽  
Abena Animwaa Yeboah-Banin ◽  
Nathaniel Boso
Keyword(s):  
Customer Satisfaction ◽  
Structural Equation ◽  
Customer Relationship ◽  
Equation Modeling ◽  
Relational Dynamics ◽  
Relational Context ◽  
Content Type ◽  
Customer Data ◽  
Proposed Model ◽  
The Relationship

Purpose Contemporary sales scholarship suggests that salespersons pursuing customer satisfaction should improvise (think and act on their feet) to find solutions to customers’ emergent problems. A missing link in this literature, however, is the relational context within which improvisation takes place and becomes effective. This study aims to examine how the tone of the salesperson–customer relationship (whether cordial or coercive) drives and conditions salesperson improvisation and its implications for customer satisfaction. Design/methodology/approach The study tests the proposed model using dyadic salesperson–customer data from business-to-business (B2B) markets in Ghana. The relationships are tested using structural equation modeling technique. Findings The study finds that salesperson improvisation is associated with customer satisfaction. It also finds the extent of cordiality between salespersons and their customers predicts but does not enhance the value of improvisation for customer satisfaction. The reverse is true for customer exercised coercive power which is not a significant driver of improvisation but can substantially alter its benefits for the worse. Practical implications By implication, salespersons should improvise more to be able to satisfy customers. However, such improvisation must be tempered with a consciousness of the relationship shared with customers and the level of power they exercise in the relationship. Originality/value Because improvised behavior deviates from routines and may be unsettling for customers, improvising salespersons must first understand whether their customers would be willing to accommodate such deviations. Yet, the literature is silent on this relational context surrounding improvisation. This study, by exploring facilitating and inhibitory relational variables implicated in improvisation, addresses this gap.

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