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The threat posed to the environment by CFC cleaning processes for printed circuit boards has led to an investigation of possible alternatives. In a preselection procedure, surprising results were obtained using propylene glycol ethers (PGE), solvents for the paint industry. In this study these ethers are compared with five other groups of cleaners, which can be divided into four water‐based classes: weak acid, neutral, weak and strong alkaline, and water miscible organic solvent cleaners which are non halogen‐containing and biodegradable. The cleaning power of PGE and other cleaners is tested on fluxes for wave and reflow soldering. Comparative results for the different groups are given, combined with surface insulation resistance measurements. Good results can be obtained using alkaline or solvent cleaners. However, it appears that the cleaning results depend heavily on the type of flux used and the choice of a matching cleaning process.

Challenge-based learning (CBL) is a trending educational concept in engineering education. The literature suggests that there is a growing variety in CBL implementations, stemming from the flexible and abstract definition of CBL that is shaped by teachers' perceptions. The chapter discusses how the CBL concept has been developed at Eindhoven University of Technology and describes the development and use of two educational resources aimed to facilitate conceptualization, design, and research of CBL for curriculum designers and teachers. The first resource is a set of CBL design principles for framing the variety of CBL and providing teachers with advice about how to develop CBL courses within an overall CBL curriculum. The second resource is a curriculum-mapping instrument called the CBL compass, which aims at mapping CBL initiatives and identifying gaps, overlaps, and misalignments in CBL implementation at a curriculum level. Both CBL design principles and the CBL compass have been developed by combining insights from theory and practical examples of CBL at TU/e into a higher order model of vision, teaching and learning, and support. We discuss the two educational instruments and showcase their application in the Eindhoven Engineering Education (E³) program, and we discuss preliminary findings and insights. The chapter concludes with recommendations for future practice and research.

The purpose of this paper is to explore in detail how teachers' perceptions of workplace conditions for learning are related to their informal workplace learning activities and learning outcomes.

From a sample of 32 teachers, a purposeful sampling technique of maximal variation was used to select two cases described in this paper. In a mixed methods design quantitative data are used to position the two teachers in relation to their peers. Qualitative data are used to describe the two cases in depth.

The findings show how the diverging ways in which the two teachers perceive and actively shape their workplace conditions help to explain differences in the teachers' learning activities and learning outcomes.

Scholars have argued that informal workplace learning is embedded in interdependent practices that arise from the interaction between social practices and individual agency. The case studies provide insight into how workplace conditions for learning are shaped in this interaction and how perceptions of these conditions enable or constrain teachers' informal workplace learning.

The demise of the CFC‐113/alcohol azeotropic solvent for de‐fluxing circuit assemblies after soldering has led, in recent years, to the electronics assembly industry being offered other cleaning technologies, some new and some new to this industry. In terms of uptake, one of the most successful will be semi‐aqueous cleaning involving the use of an organic solvent of low volatility to dissolve the contamination followed by an aqueous rinsing process. Two families of solvent have evolved based on natural products (terpenes) and synthetic hydrocarbon chemicals. This paper reviews the possible semi‐aqueous processes and the development of the solvents that has taken place. The cleaning performance is considered as well as the potential for effluent control and fully closed‐loop systems.

The subject of the quantitative measurement of solderability of electronic components is introduced. The wetting balance in various configurations and modes of operation is being used as the focal point to establish a quantitative measurement capability for solderability of conventional leaded components, surface mounting components and printed circuit interconnections. The principles of operation of the wetting balance and the factors that influence the measurement are discussed. This paper is the first of a series that will cover the development of traceable reference standards for wetting balance calibration, the influence of instrumental design on the measurement, the standardisation of the measurement procedures, the choice and evaluation of a solderability index for the dynamic measurement, and the traceability of the measurement to international standards.

This paper presents emerging findings from an ongoing research project which aimed to explore online lesson study (OLS) as a vehicle for teacher collaborative professional learning.

Two parallel OLS cycles with two OLS teams were facilitated by the author using Zoom and Google Drive as digital collaborative tools. Each OLS team comprised three primary teachers who taught in three different schools, with both teams' research lessons taking cross-curricular science, technology, engineering and maths (STEM) focus. In order to explore the influence of OLS on teachers' collaborative professional learning outcomes in STEM, a qualitative case study approach was adopted, with data drawn and thematically analysed from OLS meeting transcripts, semi-structured interviews with teachers and the author's reflective diary. Boundary crossing is used as a theoretical lens to ascertain the potential of OLS as a vehicle for teacher collaborative professional learning.

Findings suggest that OLS facilitated collaborative learning and positively contributed to teacher participants' co-construction of knowledge in relation to STEM teaching approaches.

The study described in this paper represents the first OLS conducted in the Irish context and also represents the first inter-school lesson study (LS) conducted in the Irish primary context.

To empirically test for an impact on profit performance when activity-based costing (ABC) is used in companies with customer service and low-price strategies. We also investigate whether the profit impact of ABC usage is affected by higher-quality information systems.

Survey.

We find a positive impact on profit performance when ABC is used by companies with customer service as a strategic priority but not when ABC is used by companies with lower emphasis on customer service. For companies emphasizing low-price strategies, we find a positive impact on profit performance, especially when ABC is used together with high-quality information systems.

This study develops a method of measuring strategic priorities of a firm. It divides firms into strategy groups based on their degree of emphasis on three strategic priorities: low price, flexibility, and customer service.

Identifies certain contexts when ABC is especially beneficial.

If the use of ABC information leads to better strategic and operational decisions, firm performance should improve. However, prior research on the impact of ABC on firm performance has found little to no connection and usually only when it is used with other practices. This is the first study to find an impact on profit performance for firms with customer service and low-price strategies and high-quality information systems.

This work examines the intersection between traditional human resource management and the novel employment arrangements of the expanding gig economy. While there is a substantial multidisciplinary literature on the digital platform labor phenomenon, it has been largely centered on the experiences of gig workers. As digital labor platforms continue to grow and specialize, more managers, executives, and human resource practitioners will need to make decisions about whether and how to utilize gig workers. Here the authors explore and interrogate the unique features of human resource management (HRM) activities in the context of digital labor platforms. The authors discuss challenges and opportunities regarding (1) HRM in organizations that outsource labor needs to external labor platforms, (2) HRM functions within digital labor platform firms, and (3) HRM policies and practices for organizations that develop their own spin-off digital labor platform. To foster a more nuanced understanding of work in the gig economy, the authors identify common themes across these contexts, highlight knowledge gaps, offer recommendations for future research, and outline pathways for collecting empirical data on HRM in the gig economy.