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This paper aims to address the influence of diamond-like carbon (DLC) coatings on the frictional power loss of spur gears. It shows potentials for friction and bulk temperature reduction in industrial use. From a scientific point of view, the thermal insulation effect on fluid friction is addressed, which lowers viscosity in the gear contact due to increasing contact temperature.

Thermal insulation effect is analyzed in detail by means of the heat balance and micro thermal network of thermal elastohydrodynamic lubrication contacts. Preliminary results at a twin-disk test rig are summarized to categorize friction and bulk temperature reduction by DLC coatings. Based on experiments at a gear efficiency test rig, the frictional power losses and bulk temperatures of DLC-coated gears are investigated, whereby load, speed, oil temperature and coatings are varied.

Experimental investigations at the gear efficiency test rig showed friction and bulk temperature reduction for all operating conditions of DLC-coated gears compared to uncoated gears. This effect was most pronounced for high load and high speed. A reduction of the mean gear coefficient of friction on average 25% and maximum 55% was found. A maximum reduction of bulk temperature of 15% was observed.

DLC-coated gears show a high potential for reducing friction and improving load-carrying capacity. However, the industrial implementation is restrained by the limited durability of coatings on gear flanks. Therefore, a further and overall consideration of key durability factors such as substrate material, pretreatment, coating parameters and gear geometry is necessary.

Thermal insulation effect of DLC coatings was shown by theoretical analyses and experimental investigations at model test rigs. Although trial tests on gears were conducted in literature, this study proves the friction reduction by DLC-coated gears for the first time systematically in terms of various operating conditions and coatings.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0257/

This paper analyses how contextual factors at universities (entrepreneurship education and program learning) and cognitive variables (perceived behavioral control, implementation intentions, and attitude) influence entrepreneurial intentions among Latin American university students.

The empirical analysis employs a multilevel (hierarchical) linear model with a sample size of 9012 university students taken in 2018 from nine Latin American countries: Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, México, Panamá, and Uruguay.

Overall, the university context and cognitive variables contribute to explaining entrepreneurial intentions in university students. Whereas program learning constitutes a variable that directly and indirectly explains entrepreneurial intentions among university students, attending entrepreneurship courses negatively influences their entrepreneurial intentions.

A central premise of this study is that the entrepreneurial process in university students is a multilevel phenomenon, given that university context and cognitive variables are key factors in entrepreneurial intentions. The findings support this premise and contribute to the existing literature on entrepreneurship in emerging economies. Nevertheless, the results reveal a more nuanced picture regarding the role of university context on the entrepreneurial intentions of students.

Este artículo analiza cómo las variables del contexto universitario (educación emprendedora y aprendizaje adquirido) y las variables cognitivas (control de conducta percibido, intenciones de implementación y actitud) influyen en la intención emprendedora de los estudiantes universitarios latinoamericanos.

El análisis empírico es por medio de un modelo lineal multinivel (jerárquico) con una muestra de 9012 estudiantes universitarios de nueve países latinoamericanos, a saber: Argentina, Brasil, Chile, Colombia, Costa Rica, Ecuador, México, Panamá, y Uruguay.

En general, el contexto universitario y las variables cognitivas contribuyen a explicar la intención empresarial de los estudiantes universitarios. Mientras que el aprendizaje adquirido (program learning) constituye una variable que explica la intención emprendedora de los estudiantes universitarios directa e indirectamente, matricular cursos de emprendimiento influye negativamente en su intención emprendedora.

Una premisa central en este estudio es que el proceso emprendedor de los estudiantes universitarios es un fenómeno multinivel, resultando el contexto universitario y las variables cognitivas factores clave para explicar la intención emprendedora. Nuestros resultados apoyan esta premisa y contribuyen a la literatura sobre emprendimiento en países emergentes. No obstante, nuestros resultados revelan una imagen más matizada del papel del contexto universitario en la intención empresarial de los estudiantes universitarios.

This article reviews research findings related to the “art” of constructing survey questionnaires. It discusses some of the important issues that should be considered in gathering quality data via questionnaires, provides general suggestions for their construction, includes a comprehensive list of important reference sources, and examines some of the survey‐based studies published in Integrated Manufacturing Systems. Constructing a good questionnaire requires a thorough grasp of the intricacies of the topical area and detailed knowledge of the strengths and weaknesses of the different survey administration modes. In addition, questionnaire construction entails close attention to details about the wording of questions, their instructions, their response choices, and their sequence. Most importantly, the research instrument should be refined based on guidance from repeated pretests. Well‐constructed questionnaires can ensure the consistent meaning of the questions across respondents and can contribute to data quality by decreasing both item and unit nonresponse.

This work addresses how consumer perceptions of quality may be influenced by the composition of competition. I develop a theoretical framework that explains how consumer evaluations of quality can be negatively impacted by a product's stylistic similarity to popular competitors. These issues are examined empirically using more than 75,000 online consumer evaluations, from the evaluation aggregator Rotten Tomatoes, of 123 feature films released in the United States during 2007. Results suggest that during a movie's opening week, movies that are stylistically similar to the top-performing box office movie are evaluated less favorably. Additional analyses indicate that this negative effect may persist in later periods due to social conformity pressures, and that there is reduced demand for those movies that are stylistically similar to the top box office performer. This article contributes to the broader literature in strategic management by depicting how stylistic features of competitors can affect consumer behaviour and perceptions of quality in markets. This work also suggests managerial implications for entry-timing decisions and positioning choices.

This paper aims to discuss the dynamic interactions among knowledge management, strategic foresight and emerging technologies, resulting in a framework that can help companies to shape these interactions for achieving positive outcomes.

This conceptual paper is based on prior literature streams, which were interrelated through an abductive research process. This iterative conceptualization approach led to the formation of testable propositions that advance the understanding on the interactions among knowledge management, strategic foresight and emerging technologies.

The framework demonstrates the existence of an actions cycle between strategic foresight and knowledge management through a constructivist perspective, where one can improve the other. These interactions can be useful both for the development of emerging technologies and for identifying these innovations in market that can be applied in companies. Hence, all these dynamic interactions do not point to a hegemonic relationship of one construct over the others, but for the value equality among them.

Although current literature points to the existence of relationships among knowledge management, strategic foresight and emerging technologies, the dynamism inherent in these interactions as well as their positive effects for companies’ results are not properly discussed. This paper fills such a gap and proposes directions for future research.

This chapter aims to explore how emotional language construing experiences of UK COVID-19 lockdown in the present frames expectations for future behaviours and intended memories. We analyse 102 responses collected through an online narrative survey during the first lockdown in the United Kingdom. The survey asked participants to articulate ‘an image to remember lockdown by’. Taking a positive discourse analysis approach, using corpus linguistics and systemic functional linguistics tools, we challenge the primarily negative mainstream discourses of COVID-19 and lockdown experiences and explore how language choices evaluating different aspects of life in lockdown evoke emotion to construe a desired projected future. Findings indicate that respondents actively and selectively articulate primarily positive intended memories based on kinship peace and nature that contrast with normal life experiences. Such choices are framed within emotional states enacted through language choices. We argue that these projected memories act as a ‘time capsule’ whereby decisions to retain positive memories help to promote adaptive well-being in the face of potentially overwhelmingly negative circumstances.

Understanding the impact of diversity on group process and performance has been the focus of much research, yet there are still unanswered questions about how diversity impacts group process and performance. One factor that is clearly a consequence of group composition is affective tone. In this chapter, we discuss the impact of diversity and homogeneity on affective responses from group members and argue that the relatively negative affective tone experienced in diverse groups may fuel more systematic information processing and improve decision-making performance. The implications for managing both positive and negative affect in groups will be considered.

While researchers in other disciplines seek to determine the impact that humour has in personal interactions, studies of humour in service delivery are lacking. The purpose of this paper is to examine whether it is beneficial to deliberately use humour in service encounters.

This paper provides a comprehensive review of humour research in multiple disciplines to assess the applicability of their key findings to the service domain. By establishing the antecedents, types, and consequences of humour, the authors build a framework and propositions to help service researchers uncover the potential of injecting humour into service interactions.

The authors find that using humour in service encounters is an ingenious affiliative behaviour which strengthens rapport between service employees and their customers. Humour also permits frontline service employees to better cope with the emotional challenges of their work, thus promising to reduce emotional labour and increase well-being. The effectiveness of service recovery efforts may also grow if employees use humour successfully to soften unpleasant emotional reactions and accept responsibility.

The authors explore cross-disciplinary humour research to apply the findings to the use of humour in service encounters. The authors also attempt to identify situations in which humour usage is most promising or beneficial, as well as its main beneficiaries.

There is a huge amount of information and data stored in publicly available online databases that consist of large text files accessed by Boolean search techniques. It is widely held that less use is made of these databases than could or should be the case, and that one reason for this is that potential users find it difficult to identify which databases to search, to use the various command languages of the hosts and to construct the Boolean search statements required. This reasoning has stimulated a considerable amount of exploration and development work on the construction of search interfaces, to aid the inexperienced user to gain effective access to these databases. The aim of our paper is to review aspects of the design of such interfaces: to indicate the requirements that must be met if maximum aid is to be offered to the inexperienced searcher; to spell out the knowledge that must be incorporated in an interface if such aid is to be given; to describe some of the solutions that have been implemented in experimental and operational interfaces; and to discuss some of the problems encountered. The paper closes with an extensive bibliography of references relevant to online search aids, going well beyond the items explicitly mentioned in the text. An index to software appears after the bibliography at the end of the paper.