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Microtextured surfaces can reduce friction in tribological systems under certain contact conditions. Because it is very time-consuming to determine suitable texture patterns experimentally, numerical approaches to the design of microtextures are increasingly gaining acceptance. The purpose of this paper is to investigate to what extent the selected modeling approach affects optimized texturing.

Using the cam/tappet contact as an application-oriented example, a simplified 2D and a full 3D model are developed for determining the best possible texturing via a design study. The study explores elongated Gaussian-shaped texture elements for this purpose. The optima of the simplified 2D simulation model and the full 3D model are compared with each other to draw conclusions about the influence of the modeling strategy. The target value here is the solid body friction in contact.

For the elongated texture elements used, both the simplified 2D model and the full model result in very similar optimal texture patterns. In the selected application, the simplified simulation model can significantly reduce the computational effort without affecting the optimization result.

Depending on the selected use case, the simulation effort required for microtexture optimization can be significantly reduced by comparing different models first. Therefore, an exact physical replica of the real contact is not necessarily the primary goal when it comes to texture selection based on numerical simulations.

In the aftermath of disasters, humanitarian actors need to coordinate their activities based on accurate information about the disaster site, its surrounding environment, the victims and survivors and the supply of and demand for relief supplies. In this study, the authors examine the characteristics of radio frequency identification (RFID) technology and those of disaster relief operations to achieve information visibility and actor coordination for effective and efficient humanitarian relief operations.

Building on the contingent resource-based view (CRBV), the authors present a model of task-technology fit (TTF) that explains how the use of RFID can improve visibility and coordination. Survey data were collected from humanitarian practitioners in India, and partial least squares (PLS) analysis was used to analyze the model.

The characteristics of both RFID technology and disaster relief operations significantly influence TTF, and TTF predicts RFID usage in disaster relief operations, providing visibility and coordination. TTF is also a mediator between the characteristics of RFID technology and disaster relief operations and between visibility and coordination.

The many recent humanitarian disasters have demonstrated the critical importance of effective and efficient humanitarian supply chain and logistics strategies and operations in assisting disaster-affected populations. The active and appropriate use of technology, including RFID, can help make disaster response more effective and efficient.

Humanitarian actors value RFID technology because of its ability to improve the visibility and coordination of relief operations. This study brings a new perspective to the benefits of RFID technology and sheds light on its antecedents. The study thus expands the understanding of technology in humanitarian operations.

The creation of positive social change (PSC) is considered the primary success criterion when evaluating social enterprise performance. However, despite a proliferation of PSC-measurements, their empirical validity and applicability in emerging economies remain largely unclear. The quantitative study examines the validity of the PSC-measurement approaches proposed by Bloom and Smith (2010; Bloom and Smith approach [BSA]) and Weaver (2020b; Weaver approach [WA]) in South Africa.

Investigating a representative sample of 347 social entrepreneurs from Gauteng and Limpopo provinces, the authors use questionnaire data to explore the factorial, convergent and discriminant validity of both PSC-measurement approaches. Statistically, this is done by applying factorial and correlation analyses.

The results yield acknowledgeable differences. BSA has a high factorial and convergent validity, while its discriminant validity remains doubtful. For WA, problems concerning factorial validity occur.

Despite limited generalizability, the authors provide a first guideline for scholars regarding the empirical validity of BSA and WA outside the context of developed economies.

The current study sheds light on the validity of two PSC-measurement approaches in an emerging economy context. This way, the authors contribute to the field by addressing the scarcity of empirical research and the restricted scope of developed economies regarding PSC-measurement.

The self-initiated nature of migration by self-initiated expatriates (SIEs) may make them more susceptible to the impact of the national context within which their adjustment takes place. Consequently, the failure or success of the expatriation depends on an SIE's ability to adapt to this national context. The paper aims to contribute to the adjustment theory literature by using the contextual angle and examining the impact of historical, legal, employment and hiring contexts on adjustment.

The paper uses data from a qualitative study of 42 in-depth interviews with German SIEs. The study used semi-structured in-depth interviews in order to collect a wide range of information on adjustment experiences, circumstances and expectations, enabling comparative analysis. All participants have self-initiated their move to Britain and relocated without organisational support, held university diplomas, worked according to their qualifications and relocated following a job offer.

Among the study's main findings is impact of national context on adjustment experience, especially the historical relations between the countries involved. German SIEs have enjoyed easy adaptation in their new workplaces due to structurally favourable positions within the local hierarchies of prejudice, which can be attributed to the complex historical relations between Germany and Britain. Furthermore, this study draws the attention to the particularities of the nationally constructed hiring practices. In particular, the speedy recruitment in Britain presented additional challenges in adjustment for some participants, while facilitating it for others.

This study focuses on a specific population, and further research is needed to determine whether the findings can be generalised to other groups of SIEs in Britain and elsewhere. Another limitation of the study is the homogeneous nature of the sample in terms of education level and participant employment status (educated at a university level and found employment before relocation). Future research avenues include applying a comparative approach and focusing on the intersection between national context, employment circumstances, educational level and SIE adjustment.

The study documents the complex effects of the hiring context on SIE adjustment and suggests that communicating the nationally constructed recruitment practices will align the expectations of both parties. This may increase the effectiveness of hiring and placing within the company and have a positive impact on the adjustment and work performance of the SIE. Furthermore, understating the particularities of each national context can enable international human resources management (IHRM) professionals to assess the specificity of each potential employee and can provide well-considered suggestions concerning the effect of country-specific legal and historical context on their adjustment and hence provide SIEs with tailored support.

Although the adjustment of SIEs has attracted considerable research interest in recent years, it is often limited compared to the attention focused on assigned expatriates. This paper adds several original contributions to the IHRM literature. First, it expands knowledge on SIEs adjustment from a single country of origin living in a specific host country. Second, it enables a deep examination of the impact of the specific national context on SIEs adjustment as informed by certain historical and legal relations, as well as locally constructed hiring and employment practices.