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This paper describes a free‐piston driven expansion tube and its instrumentation. The facility is used to generate rarefied flows at speeds of approximately 10 km/s. Although the flow in the tube itself is in the continuum regime, rarefied flow conditions are achieved by allowing the test gas to further expand as a free jet into the facility's test section. The test flow is surveyed to provide bar‐gauge pressure measurements. Numerical simulation is then used to describe more fully the test flow properties. The flows produced are suitable for the aerodynamic testing of small models at superorbital speeds and should provide data that are suitable for the calibration of Direct Simulation Monte‐Carlo codes.

The purpose of this research is to examine the extent to which Belbin's team role theories are relevant and can be used to predict performance in the context of the Integrated Project Teams (IPTs) responsible for acquisition within the Ministry of Defence (MoD).

A sample of seven IPTs across the Defence Procurement Agency (DPA) and the Defence Logistics Organisation (DLO) completed Belbin's (1981) manual 8 Role Self Perception Inventory in order to determine their team role preferences. A team performance survey, developed by Barbara Senior in 2005, was then used to determine perceived process performance. The relationship between these two variables was examined in detail.

The results provide support to the proposition that Belbin's Team Role Theory is relevant in MoD acquisition. Certain team roles are more predominant in certain functional roles within IPTs and this duplication could have a negative impact on performance, given Belbin's assertion that “balanced” teams will perform better than “unbalanced”. The difficulties in objectively assessing team role balance (both narratively and statistically) are discussed in detail.

Whilst a representative sample of IPTs was investigated, a longitudinal study of a more extensive sample is required to substantiate these initial findings.

Belbin's Team Role Theory provides a cost effective means of potentially improving performance in defence acquisition.

While there have been some unpublished studies into functional roles in MoD teams, there is a research lacuna with regard to the examination of team roles as a factor influencing performance in defence acquisition.

Blockchain (BC) is a technological innovation that emphasizes the opposite paradigm compared to the available technology. This paradigm enables changing the firm’s business models (BMs) and has been elaborated by many experts. However, the discussion is scattered in various sources, particularly academic journals. This study aims to investigate the literature on the coexistence of BCs and BMs and depict the currently available situation that has not been discussed.

This study investigated articles focusing on the coexistence of BCs and BMs through heterogeneous academic databases, namely, Emerald, ProQuest, Taylor & Francis, ScienceDirect and Scopus. The systematic approach and development of inclusion criteria used in this study resulted in 52 key articles for further review. This systematic review followed the PRISMA framework and a timeframe between 2012 and 2022.

This study classifies literature based on specific themes, the integration of BC (interaction and evolution) and BM innovation (innovativeness, new value system and system logic), including the research design. As expected, the literature on BCs and BMs appears to be focused on particular themes since this topic appears to have grown. This study identifies gaps in the literature and describes future research to accommodate the study discrepancy.

The major limitation of this study is the research bias. Such a bias might occur due to the misinterpretations of researchers in this study. In the process of devising databases and keywords, this study identified the potential for misinterpretation. This study sought to use rigid protocols through a manual approach to mitigate the potential bias. A research bias also has the potential to arise in the literature classification. A literature categorization is performed back and forth, by referring to the theory or concept of a particular topic. The next limitation is limited access to scientific databases. This study drew upon several reputable scientific journal databases. However, the researcher considered the journal selection to be built upon a journal’s accessibility, multi-disciplinary nature and data size compared to other journals. It allows the analysis results to be biased, as they do not represent all available databases. However, the study used the available formal access to maintain the integrity of this research.

This study conducts a systematic review that discusses the coexistence of BCs and BMs. Furthermore, it provides a profound understanding of the discussion carried out through certain themes and the outlook for the future.