The dynamics of pulsed jetting in squids throughout ontogeny is not well understood, especially with regard to the development of vortex rings, which are common features of mechanically generated jet pulses (also known as starting jets). Studies of mechanically generated starting jets have revealed a limiting principle for vortex ring formation characterized in terms of a ;formation number' (F)...

HEYLAND, A., MOROZ, L.L.; [email protected]. The Whitney Laboratory for Marine Bioscience, Saint Augustine, University of Florida SEARCH FOR NEURONAL TRANSCRIPTS INVOLVED IN THE METAMORPHIC TRANSITION OF THE SEA HARE APLYSIA CALIFORNICA Metamorphosis among many marine invertebrate species involves a radical transition from a larval to a juvenile/adult body plan that can occur in a remarkably sho...

The ability to capture the unsteady dynamics of high speed compressible flows requires the use of ultra fast imaging diagnostics. Application of particulate based scattering techniques in high speed flows requires the use of high power, nanosecond duration, pulsed illumination sources such as Nd:YAG lasers in order to record high quality images. Furthermore, the temporal bandwidth of the measur...

The fluid-structure interaction of flexible bodies in steady and unsteady flow is a key area of interest for the development of underwater vehicles. In the design of marine vehicles the flow can often be seen as an obstacle to overcome, whilst in nature a fish interacts with the flow and is capable of achieving a high level of efficiency. Therefore by understanding how fish – or flexible bodies...

Pulsed-jets are commonly used for aquatic propulsion, such as squid and jellyfish locomotion. The sudden ejection of a jet with each pulse engenders the formation of a vortex ring through the roll-up of the jet shear layer. If the pulse is too long, the vortex ring will stop forming and the remainder of the pulse is ejected as a trailing jet. Recent results from mechanical pulsedjets have demon...

Natural convection in a box is driven by the thermal boundary conditions at the active walls and is profoundly affected by the thermal conditions at the passive walls. The effects of these conditions were studied numerically and compared with experiments for natural convection in two cavities. The results indicate the importance of these conditions for proper modelling of three-dimensional flow...

•DPF-3, a DPPIV family protease, protects C. elegans fertility•Loss of DPF-3 alters cellular endo-siRNA profiles and desilences transposons•DPF-3-mediated processing WAGO-1/-3 Argonaute proteins promotes siRNA sorting•A combination processing-refractive WAGO-1 WAGO-3 phenocopies loss Small RNA pathways defend the germlines animals against selfish genetic elements, yet pathway activities need to...

The purpose of this paper is to explore the area of complexity and its link to systems thinking, with a view to defining the methodological requirements for extension services targeting complex problem situations. Agriculture in Australia is faced with a set of challenges that seem more complex than those several decades ago. In a change management context this poses significant challenges to t...