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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…
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…
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.