C. Zardini, F. Rodes, G. Duchamp and J.‐L. Aucouturier
Among the main factors to be considered for the thermal optimisation of hybrid power modules are: the thermal resistance between the power chips and the bottom of the case; the…
Abstract
Among the main factors to be considered for the thermal optimisation of hybrid power modules are: the thermal resistance between the power chips and the bottom of the case; the thermal coupling between adjacent chips; and the ability of the module to withstand the thermal overloads induced by electrical surges. In this paper, the authors show how a finite element code can be used to optimise a hybrid power assembly in both steady‐and unsteady‐state. Comparisons made between results obtained with 3D and 2D simulations show that for hybrid power modules 2D simulations are generally unreliable. However, thermal studies cannot guarantee the reliability of hybrid power assemblies. Studies relative to hybrid power circuits must be thermomechanical.
C. Zardini, J.D. Pistre, F. Rodes and J.L. Aucouturier
Water cooling of hybrid modules allows a power dissipation much higher than that of conventional methods. This paper describes the design and construction of a copper‐clad Invar…
Abstract
Water cooling of hybrid modules allows a power dissipation much higher than that of conventional methods. This paper describes the design and construction of a copper‐clad Invar water‐cooled hybrid power circuit intended for use in a medical hand‐held tool which is a 25 mm diameter cylinder. The thermal study demonstrates the interest of a copper‐clad Invar heat exchanger: water flowing at a rate lower than 15 Ih−1 allows the dissipation of more than 50 W in the module while keeping the external temperature of the tool below 35°C.
Marc Monneraye, Panizza, Brian Waterfield, John Knowles and P.L. Bainbridge
A month or so after the Stresa meeting, the French ISHM chapter, organising a session on ‘Gallic inks’ (!), summoned me to deliver some comments on the 5th European Hybrid…
Abstract
A month or so after the Stresa meeting, the French ISHM chapter, organising a session on ‘Gallic inks’ (!), summoned me to deliver some comments on the 5th European Hybrid Microelectronics Conference. Although it was only a matter of interlude during this technical session, I felt the task quite a difficult one. It became a hazardous project when Brian C. Waterfield kindly asked me to let what is in fact a personal opinion—my personal opinion, standing back from my daily work—appear in Hybrid Circuits. I'll do my best.
In this contribution a linear thermal model for hybrid circuits is presented. Both the heat dissipated in screen printed resistors and in mounted components such as transistors…
Abstract
In this contribution a linear thermal model for hybrid circuits is presented. Both the heat dissipated in screen printed resistors and in mounted components such as transistors and integrated circuits is taken into account.
Sunil Dutt Trivedi, Abhinav Nigam and Ashutosh Pareek
The paper aims to identify and report service quality dimensions critical to distributors’ perception of the quality of services their suppliers provide (Manufactures).
Abstract
Purpose
The paper aims to identify and report service quality dimensions critical to distributors’ perception of the quality of services their suppliers provide (Manufactures).
Design/methodology/approach
This research used unstructured interviews and focused group discussions. The authors have interviewed ten distributors and ten frontline managers of three mid-size Consumer Packaged Goods companies operating in India. Two focused group discussions were conducted involving academicians and practitioners in the service quality domain.
Findings
Seven quality dimensions critical to a distributor’s service quality evaluation have been identified. Except for tangibility, all other SERVQUAL dimensions have been found relevant. Three additional dimensions, namely “Fairness,” “Accessibility” and “Image quality,” have been identified. The authors made a theoretical contribution by not only identifying the relevant dimension but also proving their context-specific definition. The authors also present managerial implications and recommendations to improve the service experience of distributors.
Originality/value
This paper investigates the distributor–manufacturer dyadic relationship from a service quality perspective for the first time. This study made a theoretical contribution by explicitly identifying service quality dimensions for a manufacturer-to-distributor (M2D) service relationship.
Details
Keywords
A. Arshak, K. Arshak, G. Lyons, D. Waldron, D. Morris, O. Korostynska and E. Jafer
Telemetry capsules have existed since the 1950s and were used to measure temperature, pH or pressure inside the gastrointestinal (GI) tract. It was hoped that these capsules would…
Abstract
Purpose
Telemetry capsules have existed since the 1950s and were used to measure temperature, pH or pressure inside the gastrointestinal (GI) tract. It was hoped that these capsules would replace invasive techniques in the diagnosis of function disorders in the GI tract. However, problems such as signal loss and uncertainty of the pills position limited their use in a clinical setting. In this paper, a review of the capabilities of microelectromechanical systems (MEMS) for the fabrication of a wireless pressure sensor microsystem is presented.
Design/methodology/approach
The circuit requirements and methods of data transfer are examined. The available fabrication methods for MEMS sensors are also discussed and examples of wireless sensors are given. Finally, the drawbacks of using this technology are examined.
Findings
MEMS for use in wireless monitoring of pressure in the GI tract have been investigated. It has been shown that capacitive pressure sensors are particularly suitable for this purpose. Sensors fabricated for wireless continuous monitoring of pressure have been reviewed. Great progress, especially using surface micromachining, has been made in recent years. However, despite these advances, some challenges remain.
Originality/value
Provides a review of the capabilities of MEMS.
Details
Keywords
Theresia Mennekes, Tobias Röding, Gerhard Wagner and Hanna Schramm-Klein
The purpose of this paper is to explore the extent to which customers evaluate inferior product presentations on a local shopping platform based on the retailer (small and…
Abstract
Purpose
The purpose of this paper is to explore the extent to which customers evaluate inferior product presentations on a local shopping platform based on the retailer (small and medium-sized enterprise [SME] vs retail chain).
Design/methodology/approach
The authors conducted a between-subject online study (N = 728) with a 2 (SME vs retail chain) x 2 (high vs low-quality product presentation) between-subject experimental design. The authors conducted several analyses of variance to analyze the hypotheses and analyses of covariance for a mediating effect.
Findings
This study's results show that customers tend to overlook inaccuracies from a retail chain more often than they overlook inaccuracies from SME retailers. The authors show that the perceived competence of the retailer mediates the impact of the retailer's quality on customer purchasing intentions, not only for the presented product but also for the retailer itself.
Practical implications
Based on this study's results, the authors give implications for retailer cross-channel strategies and hint at the importance of emphasizing the retail size.
Originality/value
This paper provides important contributions to the literature on resource-advantage theory by explaining that consumers perceive quality differences within product presentations on online shopping platforms differently with regard to retail chains vs SME retailers. Moreover, the information processing theory helps to provide a theoretical foundation concerning differences in online store quality (via engineered low- vs high-quality product presentations in this study).
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Keywords
Ernesto Pacheco-Velazquez, Virginia Rodés Paragarino, Leonardo David Glasserman and Martina Carlos Arroyo
Higher education is undergoing a significant transformation, demanding a rethinking of instructional methods, the establishment of novel assessment frameworks and the…
Abstract
Purpose
Higher education is undergoing a significant transformation, demanding a rethinking of instructional methods, the establishment of novel assessment frameworks and the incorporation of state-of-the-art technologies to advance the development of learning competencies. The use of simulations is an alternative that offers satisfactory results and favors learning in new generations. This study aims to present a methodology for assessing the advancement of self-directed learning (SDL) in participants through simulation techniques and show that the incorporation of simulations can improve participants’ SDL skills.
Design/methodology/approach
This study uses a quantitative approach to evaluate the evolution of various competencies related to SDL among participants. Includes the application of scales specifically designed to measure readiness for SDL, the use of factor analysis to identify and validate essential factors and conducting hypothesis testing to verify shifts in students’ perceptions regarding the significance of SDL-related skills.
Findings
The findings of this study reveal a positive impact of simulations on the SDL readiness. Factor analysis identified five key factors: self-management skills, openness to learning opportunities, initiative and independence in learning, self-concept as an effective learner and desire for Learning. The use of simulations significantly improved critical thinking, logical reasoning, analysis and decision-making capabilities. These results demonstrate the effectiveness of this technique as a valuable tool for developing SDL skills and highlight the potential of such interventions in complex and uncertain learning environments.
Research limitations/implications
The study provided valuable insights into the impact of simulations in the logistics field, particularly in the development of SDL-related skills. There is a need for studies in other areas of knowledge that would allow for the generalization of these results. Likewise, it is advisable to use scales that measure the development of other types of skills. Additionally, the study’s focus on short-term effects may not fully capture the long-term development of SDL-related skills. Future research should address these limitations, expand the sample size, conduct longitudinal studies and explore possible contextual and external factors that may influence SDL outcomes in various educational settings, leading to broader and more robust conclusions.
Practical implications
The practical implications of this study are significant for both higher education institutions and educators in the logistics domain. The positive impact of the serious game on participants’ SDL skills highlights the potential of incorporating interactive and engaging learning tools in the curriculum. Educators can leverage serious games to foster critical thinking, logical reasoning and decision-making abilities in their students. Moreover, the identified key factors influencing SDL development provide valuable guidance for designing targeted interventions to enhance students’ self-management, initiative and love for learning.
Social implications
The social implications of this study underscore the importance of equipping individuals with SDL skills in a rapidly changing world. By integrating serious games and fostering SDL competencies, higher education institutions can contribute to a more adaptable and resilient workforce. Empowering students with critical thinking, innovative thinking and independent learning, they can enhance their ability to navigate the challenges of the labor market. This, in turn, may lead to a more informed and proactive society capable of addressing complex issues and making well-informed decisions.
Originality/value
This article arises from empirical exploration with students from two countries in Latin America (Mexico and Colombia), examining the importance of games in developing SDL skills. Furthermore, it promotes the use of a methodology with a low level of complexity, and that can be replicated with different games. This perspective adds valuable insights to the existing literature, offering practical implications for educators and institutions seeking effective strategies to promote SDL skills among students.
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Keywords
K. Jagannath, S. Sharma, N. Mohan, Achutha Kini and P. Prabhu
This paper presents manufacturing of metallic composites using stir-casting method. The setup details and manufacturing methodology are explained. Microstructure and…
Abstract
This paper presents manufacturing of metallic composites using stir-casting method. The setup details and manufacturing methodology are explained. Microstructure and characterization of graphite-tin composite is also included. The tensile strength and hardness improvement is observed in tin-graphite MMC with increase in weight percentage of graphite. Metal-matrix composites (MMC's) are now attracting enormous interest. One of the prime reasons for this is that significant advances have been made in recent years on the development of fabrication routes, which are economically attractive and generate material of high micro structural quality. In particular, it is possible to produce composites, which are relatively free from gross defects (Clyne and Mason, 1987; Smith and Froes, 1984; Rodes and Spuurling, 1985; Hunt, 1989; Ted Guo and Tsao, 2000). However, it depends on the ability of synthesizing them with a consistent reproducibility in microstructure and properties. With continual development in fabrication techniques, MMC's have been found to be suitable to replace some of the conventional metallic monolithic alloys.