OBJECTIVES Our main aim was to study the long-term neuropsychological effects of non-saturation diving. Further, we aimed to investigate whether neuropsychological performance was predictive of subsequent diving accidents and diving status. METHODS In this prospective longitudinal study, we enrolled 50 male diving students (mean age 25.3 years) at a diving school and followed them up six and ...

Recreational diving on coral reefs is an activity that has experienced rapidly growing levels of popularity and participation. Despite providing economic activity for many developing coastal communities, the potential role of dive impacts in contributing to coral reef damage is a concern at heavily dived locations. Management measures to address this issue increasingly include the introduction ...

Enyne metathesis is a bond reorganization of an alkene and an alkyne to produce a 1,3-diene (eqs 1 and 2 in Scheme 1). It has been used in both intramolecular and intermolecular applications. Enyne metathesis bears a mechanistic kinship to alkene metathesis; however, it is less-studied than alkene metathesis. The enyne bond reorganization is atom economical and is driven by the enthalpic stabil...

Diver propulsion vehicles (hereinafter referred to as DPV) are a kind of small vehicle with underwater high-speed used by divers, who able grasp or ride on, and operate the volume switch change speed. Different from unmanned (UUVs), interference caused diver’s posture changing is unique problem. In this paper, Diver–DPV multi-body coupling hydrodynamic model considering rigid body dynamics flui...

AIM To determine the consensus and concordance with published standards and expert opinion among New Zealand's designated diving doctors (DDDs) and general practitioners (GPs) regarding medical fitness-to-dive. METHODS A postal survey canvassed doctors' opinions regarding fitness-to-dive of 20 'real-life' applicants with potentially relevant medical conditions. In 17 cases, a 'desired respons...

Scuba has permitted in situ research of the early life histories of subtidal marine invertebrates, limited only by the small size of early stages. Investigators have used scuba to observe, among other things, coral spawning, including the spectacular mass spawns on the Great Barrier Reef, which established that most corals are hermaphroditic broadcast spawners. Observations and experiments have...

The Sub-millimetre Common User Bolometer Array (SCUBA) at the JCMT employs a chopping and nodding observation technique to remove variations in the atmospheric signal and improve the long term stability of the instrument. In order to understand systematic effects in SCUBA data, we have analysed single–nod time streams from across SCUBA’s lifetime, and present an analysis of a ubiquitous optical...

SCUBA, the Submillimetre Common-User Bolometer Array, built by the Royal Observatory Edinburgh for the James Clerk Maxwell Telescope, is the most versatile and powerful of a new generation of submillimetre cameras. It combines a sensitive dualwaveband imaging array with a three-band photometer, and is sky-background limited by the emission from the Mauna Kea atmosphere at all observing waveleng...