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This paper presents the results of the first sea-test of Tsukuyomi — a prototype of underwater gliders for virtual mooring. Its will be able to stay in a designated water for more than one year, reciprocating between the sea-surface and the seafloor up to 3,000 meters in depth. It will sleep on the seafloor to elongate the operation time. We have successfully conducted tank-test in December 2011 and...
The submarine cables laid in the sea area where fishery is active, are usually buried in the seabed. However, sufficient burial depth cannot be achieved in areas with strong current due to less sedimentary layer for burial availability. The authors have developed a “Fall Pipe Rock Dumping System”, capable of protecting the submarine power cables laid between the water depth of up to 165m and have...
Aiming to develop a strategy for the conservation of freshwater dolphins inhabiting Asian areas, a new international collaborating project for real time networking of freshwater dolphin's observatories in Asian waters using passive acoustic monitoring system between Japanese team, Indian team and Indonesian team has been started since April 2010. The project networks the data from the observatories...
The authors have been developing an acoustic observation system that can record the high frequency bio-sonar clicks of the Ganges river dolphins and can estimate their 3-D location in real-time. In order to expand the coverage of the acoustic measurement, a new integrated observation system, which consists of one main array system and the newly developed multiple small array system, is proposed. For...
The design concept of a prototype underwater glider “Tsukuyomi” for virtual mooring is described. It uses a buoyancy engine for propulsion as it ascends and descends between the seafloor and the ocean surface to monitor the underwater environment. Its maximum operating depth is 3,000 m. It can sleep for a fixed time on seafloor to extend the observation period. We have already conducted towing-tank...
Long-term real-time monitoring of free-ranging Bottlenose dolphins (Tursiops truncatus) in the pool of the aquarium “Izu Mito Sea paradise”, i.e. in the enclosed observatory has been started from 22nd June 2008, and continuously conducted ever since then. The monitoring system consists of (1) a modified 5-hydrophone array system deployed in the pool, (2) a web camera placed overland for visual monitoring...
Small-angle X-ray scattering (SAXS) patterns have been calculated based on a structure model, which consisted of the bundles of long-period structures. The proposed model has produced various scattering patterns of polymers, such as the equatorial, layer line, four-spot, droplet-shaped and triangular scattering. The 0.5th order scattering has arisen when the disorder in or between the long-period...
Later-stage spinodal decomposition (SD) of polymer solutions (polypropylene/trichlorofluoromethane) induced by pressure-jump was examined in situ as a function of pressure P by using time-resolved light scattering method with the cell designed for high pressure and high temperature. The time-evolution of the magnitude of scattering vector q m (t,P) at maximum scattered intensity and the maximum...
Background: Gl endoscopy without general anesthesia causes a hyperperistaltic state in the stomach, which frequently necessitates the use of antispasmodic agents, such as hyoscine-N-butylbromide, but these drugs have side effects. Peppermint oil is harmless and acts locally to inhibit Gl smooth muscle contraction.Methods: A randomized double-blind, double-dummy, controlled trial was conducted in 100...
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