Search results

The purpose of this paper is to study the effect of piston position on the in-cylinder swirling flow in a simplified model of a large two-stroke marine diesel engine.

Large eddy simulations with four different models for the turbulent flow are used: a one-equation model, a dynamic one-equation model, a localized dynamic one-equation model and a mixed-scale model. Simulations are carried out for two different geometries corresponding to 100 and 50 percent open scavenge ports.

It is found that the mean tangential profile inside the cylinder changes qualitatively with port closure from a Lamb-Oseen vortex profile to a solid body rotation, while the axial velocity changes from a wake-like profile to a jet-like profile. The numerical results are compared with particle image velocimetry measurements, and in general, the authors find a good agreement.

Considering the complexity of the real engine, the authors designed the engine model using the simplest configuration possible. The setup contains no moving parts, the combustion is neglected and the exhaust valve is discarded.

Studying the flow in a simplified engine model, the setup allows studies of fundamental aspects of swirling flow in a uniform scavenged engine. Comparing the four turbulence models, the local dynamic one-equation model is found to give the best agreement with the experimental results.

This article reports the results from a panel discussion held at the 2019 European Conference on Information Systems (ECIS) on the use of technology-based autonomous agents in collaborative work.

The panelists (Drs Izak Benbasat, Paul Benjamin Lowry, Stefan Morana, and Stefan Seidel) presented ideas related to affective and cognitive implications of using autonomous technology-based agents in terms of (1) emotional connection with these agents, (2) decision-making, and (3) knowledge and learning in settings with autonomous agents. These ideas provided the basis for a moderated panel discussion (the moderators were Drs Isabella Seeber and Lena Waizenegger), during which the initial position statements were elaborated on and additional issues were raised.

Through the discussion, a set of additional issues were identified. These issues related to (1) the design of autonomous technology-based agents in terms of human–machine workplace configurations, as well as transparency and explainability, and (2) the unintended consequences of using autonomous technology-based agents in terms of de-evolution of social interaction, prioritization of machine teammates, psychological health, and biased algorithms.

Key issues related to the affective and cognitive implications of using autonomous technology-based agents, design issues, and unintended consequences highlight key contemporary research challenges that allow researchers in this area to leverage compelling questions that can guide further research in this field.

The ability to measure cognitive load in the workplace provides several opportunities to improve workplace learning. In recent years, virtual reality (VR) has seen an increase in use for training and learning applications due to improvements in technology and reduced costs. This study aims to focus on the use of simulation task load index (SIM-TLX), a recently developed self-reported measure of cognitive load for virtual environments to measure cognitive load while undertaking tasks in different environments.

The authors conducted a within-subject design experiment involving 14 participants engaged in digit-recall n-back tasks (1-back and 2-back) in two VR environments: a neutral grey environment and a realistic industrial ozone facility. Cognitive load was then assessed using the SIM-TLX.

The findings revealed higher task difficulty for the 2-back task due to higher mental demand. Furthermore, a notable interaction emerged between cognitive load and different virtual environments.

This study relied solely on an n-back task and SIM-TLX self-report measure to assess cognitive load. Future studies should consider including ecologically valid tasks and physiological measurement tools such as eye-tracking to measure cognitive load.

Identifying cognitive workload sources during VR tasks, especially in complex work environments, is considered beneficial to the application of VR training aimed at improving workplace learning.

This study provides unique insights into measuring cognitive load from various sources as defined by the SIM-TLX sub-scales to investigate the impact of simulated workplace environments.

This paper aims to advance understanding of the role of informal controls for governing day-to-day interactions in the execution phase of interfirm collaborations. It explores the nature of these informal controls and how they are used by the firm’s partners during this phase.

In-depth case study of a lateral relationship between a car manufacturer and its suppliers, based on interviews, observations and archival material, and using concepts from the field of psychology.

The results reveal an interfirm collaboration in which the supplier, in particular, relies on so-called informal interpersonal controls for micro-contracting and solving the control problems of its day-to-day interactions. Specifically, the study finds that the collaboration partners rely on interpersonal influence tactics for influencing behavior, coordinating the activities of the collaboration partners, and mitigating collaborative risks. Depending on the specific individual, in terms of, for example, their “mood”, and the contingencies of the explicit interaction, such as contradicting flanking contractual agreements, the actors engage in different activities, including ingratiation, pressure or rational persuasion.

This study illuminates the role of informal controls in interfirm settings by distinguishing analytically between interpersonal and interorganizational informal controls. By mobilizing the psychological concepts of interpersonal influence tactics, the extant research in this field is complemented through the illustration of how the actors use informal control mechanisms, depending on their corresponding counterpart, and the specific situation of the interaction. The findings thereby highlight the situated nature of governance, suggesting that governance between collaboration partners is not a static condition, rather an ongoing process in which the actors use, and alternate between, distinct tactics in their daily interactions.

The purpose of this article is to provide empirical evidence about the potential positive effects of switching from given non-reciprocal trade preferences granted under the Swiss Generalized System of Preferences (GSP) for developing countries (DCs) to negotiated reciprocal trade preferences under a Free Trade Agreement (FTA).

In a case study of Tunisia’s exports to Switzerland, the authors apply methods of matching econometrics, namely, Propensity-Score Matching and Nearest-Neighbor Matching. Hereby, they are able to identify the average treatment effect on the treated.

Overall preferential exports increased by 125 per cent after the entry into force of the FTA in 2005 until the end of the observation period in 2011. Additionally, an analysis of the agro-food and textile sectors likewise indicate boosting preferential exports in the amount of 100 per cent.

Case studies in this vein have their disadvantages. The greatest disadvantage is the lack of generalization. In contrast to studies estimating the potential effects of an FTA for several countries, the authors are not able to generalize their results based on a single case.

Because trade preferences under the Swiss GSP are offered to the country group of DCs as a whole, non-reciprocal trade preferences are not tailored to the export structure of a particular DC. By switching from non-reciprocal to negotiated reciprocal trade preferences, DCs such as Tunisia expect to negotiate terms which are tailored to their export structure as well as better conditions than competitors from countries which are still beneficiaries of the GSP.

To the authors’ knowledge, this is the first study to investigate explicitly the switch from non-reciprocal to reciprocal trade preferences using econometric matching techniques.

The purpose of this paper is to examine the pattern, duration and country-level determinants of global agri-food export competitiveness of 23 major global agri-food trading countries.

A large panel data set is compiled to facilitate assessment of the pattern, duration and country-level determinants of global agri-food export competitiveness using a revealed comparative advantage index.

The results suggest that the duration of revealed comparative advantage is heterogeneous at the agri-food product level. Long-term survival rates as revealed by the comparative advantage indices are among the highest for the Netherlands, France, Belgium, the USA, Argentina and New Zealand. The level of economic development, the share of agricultural employment, subsidies to agriculture and differentiated consumer agri-food products increase the likelihood of failure in the duration of comparative advantage, while the abundance of agricultural land and export diversification reduce that likelihood.

The framework is conceptually innovative in how it models the likelihood of failure in the duration of comparative advantage and assesses implications. Export competitiveness is a crucial factor in long-term global farm business survival as it fosters opportunities for business prosperity on global markets.

This study aims to explore the service recovery paradox (SRP) in business to business (B2B) relationships. Previously, this phenomenon has been identified in consumer-facing industries. The research advances the marketing literature by highlighting the ways in which the antecedents of the service recovery paradox differ between B2B and consumer markets.

This research draws upon findings on the SRP in the consumer setting and service failure literature in business to consumer and B2B contexts. For the analysis, interview data were collected from 43 informants among clients and service providers in the aftermath of a service failure.

The authors propose an exploratory model of the SRP for B2B relationships. In the B2B setting the propensity of eliciting the SRP depends on (1) the characteristics of the service failure, (2) the attributes of the service recovery and (3) the shared subjective perceptions among boundary spanners.

Empowered operating-level employees, straightforward communication, immediate responses and action plans that ensure future conformance are the key factors to turn service failures into increased customer satisfaction.

This study is the first to transfer the SRP from consumer marketing into the B2B domain. Moreover, it derives an exploratory model of the SRP, which can be refined by future research.

Germany has become the most important destination country for young refugees in Europe (Destatis, 2021). Vocational education and training can make an important contribution to overcome educational barriers and gain participation in society (Will & Hohmut, 2020). Since 2015, rural regions have faced new challenges in establishing effective support systems for young apprentices with forced migration experience (Ohliger et al., 2017). The participatory LaeneAs research project seeks to identify educational barriers and to promote successful educational pathways for young refugees in vocational training. In four distinct rural areas in Germany, stakeholders in formal, non-formal, and informal learning environments and young refugees will be brought together in real-world laboratories. The authors aim to open space for a co-constructive knowledge production process between scientific and political stakeholders, educational practitioners, and refugee youth. Real-world laboratories are a socio-spatial methodology that combines research and a sustainable capacity building process. The lifeworld expertise will be used for a contextual condition analysis of structural, societal, and individual barriers to education as well as for practice transfer. Building on the discussion of the current state of research and the identification of significant gaps in the practice and research landscape, this essay will focus on the critical discussion of the methodological implementation of the study.

The purpose of this paper is to determine if the institutional quality of developing countries (DCs) and least-developed countries (LDCs) contributes to a significant increase in the utilization rate of the Swiss generalized system of preferences in the agro-food sector.

The authors use state of the art regression techniques accounting for zero values to identify if the institutional quality – separately depicted by the Worldwide Governance Indicators, the Index of Economic Freedom and the Human Development Index – can contribute in overcoming non-tariff barriers (NTBs) to trade.

The institutional quality exerts a consistent positive effect on the level of utilization of trade preferences.

Swiss food trade represents, of course, only a very small share of world trade, therefore it would be worthwhile to extend the analysis to other countries and sectors.

Industrialized countries’ development policies should more strongly focus on capacity building in DCs and LDCs to strengthen trade-related institutions.

The study focuses on an often underemphasized element in international trade relations – the role of the institutional quality in overcoming NTBs to trade.

The purpose of this paper is to compare a firm’s net cost and post-apprenticeship benefits of providing apprenticeship training in Austria and Switzerland: two countries with many similarities but some critical institutional differences.

The authors draw on detailed workplace data with information on the costs and benefits of apprenticeship training, as well as on hiring costs for skilled workers from the external labour market. The authors use nearest-neighbour matching models to compare Austrian firms with similar Swiss firms based on observable characteristics.

On average, a Swiss firm generates an annual net benefit of €3,400 from training an apprentice, whereas a firm in Austria incurs net costs of €4,200. The impetus for this difference is largely a higher relative apprentice pay in Austria. However, compared with Swiss firms, Austrian firms generate a higher post-training return by retaining a higher share of apprentices and savings on future hiring costs.

The authors demonstrate that apprenticeship systems can exist under different institutional environments. For countries currently in the process of establishing or expanding apprenticeship systems, the comparative analysis clearly shows that policymakers should consider more than just one country’s particular apprenticeship model.

The authors provide a first comparative analysis between two apprenticeship countries that empirically assesses a firm’s costs and benefits of training during an apprenticeship programme and also provides a monetary value of a particular type of post-training benefits that firms can generate by retaining former apprentices as skilled workers (i.e. savings in future hiring costs for skilled workers).