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Necessary conditions represent the factors that cannot be compensated but must be present to aim the desired outcome; if a necessary condition is absent, the outcome will not exist. This logic of necessity causality differs from the conventional logic that has been evaluated by the methods drawing the lines “through the middle of the data” (e.g., regression and SEM). The authors argue that the empirical investigation of necessity causality has been largely ignored in hospitality and tourism literature although the notion of necessary causes for achieving certain outcomes is widespread throughout the studies. Thus, the authors introduce “necessary condition analysis” (NCA) as a suitable analytical method to identify necessary conditions in hospitality and tourism research. This chapter provides details on the underlying logic, key advantages, and an illustrative example of NCA. The chapter concludes by offering a few recommendations for future NCA applications in hospitality and tourism research.

As one of the tomographic imaging techniques, electrical capacitance tomography (ECT) is widely used in many industrial applications. While most ECT sensors have electrodes placed around a cylindrical chamber, the planar ECT sensor has been investigated for depth and defect detection. However, the planar ECT sensor has limited height and depth sensing capability due to its single-sided assessment with the use of only a single-plane design. The purpose of this paper is to investigate a dual-plane miniature planar 3D ECT sensor design using the 3 × 3 matrix electrode array.

The sensitivity map of dual-plane miniature planar 3D ECT sensor was analysed using 3D visualisation, the singular value decomposition and the axial resolution analysis. Then, the sensor was fabricated for performance analysis based on 3D imaging experiments.

The sensitivity map analysis showed that the dual-plane miniature planar 3D ECT sensor has enhanced the height sensing capability, and it is less ill-posed in 3D image reconstruction. The dual-plane miniature planar 3D ECT sensor showed a 28% improvement in reconstructed 3D image quality as compared to the single-plane sensor set-up.

The 3 × 3 matrix electrode array has been proposed to use only the necessary electrode pair combinations for image reconstruction. Besides, the increase in number of electrodes from the dual-plane sensor setup improved the height reconstruction of the test sample.

A description about the use of the chromatic methodology for monitoring an arc plasma jet utilised for heating micro particles for forming plasma sprayed coatings is given. It is shown that the behaviour of both the plasma and heated micro particles are distinguishable from their different coordinates on an H‐S polar map. Calibration with a standard ribbon lamp would appear feasible for tracking the temperature of the plasma heated micro particles.

Considers hysteretic non‐linear models for modelling horizontal force‐displacement characteristics of an isolation system subjected to general plane motion. Simple close form solution of the stiff differential equation of hysteretic model for forces mobilized in the non‐linear elements of the base isolation system are obtained. Simulates experimental shear force‐displacement loops obtained from the bi‐axial tests by different investigators. Both the experimental and the simulated hysteresis loops are found to be in good agreement. Develops a unified solution algorithm for computation of response of different types of base isolated buildings, considering non‐linear behaviour of the isolation systems, subjected to multi‐directional motion. The solution algorithm is based on the implicit‐implicit partitioned Newmark’s method in predictor‐corrector form. Response of the base isolated symmetrical building as obtained from the solution algorithm and the computer programs developed are in good agreement with that obtained from the more complex numerical studies reported in the literature. Response of a three storeyed symmetrical building isolated by pure friction isolators and laminated rubber bearings has been obtained using this simple yet accurate solution algorithm.

At present, the whole hospitality and tourism sector is severely impacted by the COVID-19 pandemic, and related lockdowns have been producing severe transformations in the industry. Several business reports and academic studies have highlighted that, compared to before the COVID-19 outbreak, tourists will likely choose to visit less crowded tourism destinations, and will tend to prefer accommodation facilities that can deliver their services with reduced face-to-face interactions and guaranteeing fair levels of physical and social distancing. This said, there is only a limited number of scientific studies dealing with this topic so far. This, coupled with the extremely dynamic and turbulent environment we are currently experiencing, urges scholars to further intensify the academic discussion on this area of research. Further examination would give practitioners knowledge to assist them in their decision-making in an era of tourism where everyone seems to be moving towards a ‘new normal’ of unknown duration. The present study was thus conducted to make a contribution to this debate by providing and discussing the results of a factor analysis on a sample of 200 German respondents, to dig into the criteria that travellers use to select the destination and the accommodation for their vacation. Findings contribute to deepen the scientific debate about how tourist behaviour is transformed by the COVID-19 pandemic and, potentially, by any other type of virus that could replicate a similar emphasis on hygiene and safety, as well as on social distancing. Meanwhile, our results will provide policy makers, destination marketers, and accommodation managers with useful information on effectively planning and implementing their service design in order to meet tourists' expectations and needs.

Integrating tourism and sustainability in achieving an eco-friendlier industry, this chapter highlights current trends in sustainable tourism, both in hospitality and recreational activities. The chapter describes sustainable, tourism, hospitality, and recreation trends. The research analyzes the origin of these trends, the vast majority motivated by the aftermath of the pandemic.

COVID-19 has shaken every nation in the world, and its consequences have spread throughout society. The influence of the health pandemic has left a negative imprint on both the public and private sectors, affecting thousands of people. The objective of this literature review is to explore, summarise, and analyse the state of the art of corporate social responsibility (CSR) practices in the context of COVID-19 by identifying those that have been implemented during the pandemic. This review was developed using the narrative method to gain a broader perspective of this phenomenon by analysing 30 Web of Science (WOS) articles from 1998 to 2020. The findings suggest that the implementation of CSR-focussed practices offers the possibility to change consumer behaviour towards a socially responsible approach, thus contributing to our country’s economic recovery. The inclusion of CSR within the COVID context allows for a better understanding of the socially responsible practices that have been implemented during the health restrictions.