Three-dimensional laser velocimeter simultaneity detector

A three-dimensional laser Doppler velocimeter has laser optics for a first channel positioned to create a probe volume in space, and laser optics and for second and third channels, respectively, positioned to create entirely overlapping probe volumes in space. The probe volumes and overlap partially in space. The photodetector is positioned to receive light scattered by a particle present in the probe volume, while photodetectors and are positioned to receive light scattered by a particle present in the probe volume. The photodetector for the first channel is directly connected to provide a first channel analog signal to frequency measuring circuits. The first channel is therefore a primary channel for the system. Photodetectors and are respectively connected through a second channel analog signal attenuator to frequency measuring circuits and through a third channel analog signal attenuator to frequency measuring circuits. The second and third channels are secondary channels, with the second and third channels analog signal attenuators and controlled by the first channel measurement burst signal on line. The second and third channels analog signal attenuators and attenuate the second and third channels analog signals only when the measurement burst signal is false

Privateers in Australia’s conflict and disaster zones

The private security industry has become an established component in the conflict and disaster zones where the Australian Government operates and looks set to be an enduring feature of the security landscape. Although behind the United States, United Kingdom and South Africa, Australia is now a substantial contributor to the global private security industry. Australian companies provide security services across the globe, from Asia to Africa, to governments and private clients alike. Many Australians, mostly former ADF personnel, work as contractors for PSCs—leveraging their military skills to protect infrastructure and individuals. Australians are key players in the private security industry, relied upon for their expertise, combat experience and interoperability with US and UK militaries and private security operators. The Australian Government has been forging a greater leadership role in the private security arena. Australia has been among the most forthright supporters of nascent initiatives designed to regulate the established private security industry. Australian diplomats, academic specialists and international legal experts have actively driven initiatives like the Montreux Document, the International Code of Conduct for Private Security Providers, and the development of international standards for the private security industry. In August 2013, Australia become a foundation member and key government supporter of the Association of the International Code of Conduct for Private Security Providers, contributing seed funding to this non-government organisation (NGO), which aims to provide a forum to oversee PSC operations

Shorter Personality Questionnaires—A User's Guide Part 1

In this two part series, James Bywater and Anna Brown summarise some of the issues involved in determining the correct length of assessment in a personality questionnaire (PQ). In the first instalment they discuss the general issues that test designers face, and in the second they cover some more modern solutions to these, with associated disadvantages. It is aimed at practitioners rather than hard core psychometricians and can not be exhaustive. However wherever possible it attempts to distil out practical messages for the audience