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Recruitment overfishing (the reduction of a spawning stock past a point at which the stock can no longer replenish itself) is a common problem which can lead to a rapid and irreversible fishery collapse. Averting this disaster requires maintaining a sufficient spawning population to buffer stochastic fluctuations in recruitment of heavily harvested stocks.(More)
Video communication is moving beyond face-to-face discussions on desktop computers to sharing experiences out in the real world. We explored how mobile video could enable distributed family members to share experiences wherever they occurred - kids' sporting events, birthday parties, etc. We investigated how people used two technology probes to share(More)
Biofeedback games help people maintain specific mental or physical states and are useful to help children with cognitive impairments learn to self-regulate their brain function. However, biofeedback games are expensive and difficult to create and are not sufficiently appealing to hold a child's interest over the long term needed for effective biofeedback(More)
ii c 1999 Philip Love All Rights Reserved iii Acknowledgements I would like to take this opportunity to thank my advisor Herb Keller, for all his guidance during my time here at Caltech. I also wish to thank Professor Saaman and Dale Pullin for their insight into the uid dynamics of the numerical results that I obtained. Additionally I would like to thank(More)
A critical feature of effective marine reserves is to be large enough to encompass home ranges of target species, thereby allowing a significant portion of the population to persist without the threat of exploitation. In this study, patterns of movement and home range for Lethrinus harak and Lethrinus obsoletus were quantified using an array of 33 acoustic(More)
It is now common knowledge that cervical radiculopathy, frequently caused by disc herniation and/or degeneration, will often improve without surgical intervention. Only a small percentage of patients with the severity of symptoms necessitate surgical treatment. Surgery for radiculopathy is indicated for motor weakness, progressive neurological deficits, and(More)
A scarcity of life-history data currently exists for many exploited coral reef fishes, hindering our ability to interpret fishery dynamics and develop sound conservation policies. In particular, parrotfishes (Family Labridae) represent a ubiquitous and ecologically important group that is increasingly prevalent in commercial and artisanal fisheries(More)
Biofeedback games help users maintain specific mental or physical states and are useful to help people with cognitive impairments learn to self-regulate their brain function. However, biofeedback games are expensive and difficult to create and are not sufficiently appealing to hold a user's interest over the long term. We present two systems that turn(More)
Fishing and pollution are chronic stressors that can prolong recovery of coral reefs and contribute to ecosystem decline. While this premise is generally accepted, management interventions are complicated because the contributions from individual stressors are difficult to distinguish. The present study examined the extent to which fishing pressure and(More)