Socially isolated Macropodus opercularis showed a distinct approach response to water taken from the tank of a conspecific individual or a nonconspecific, Trichogaster trichopterus, but not to water from a tank without fish. It is proposed that these species produce chemical stimuli which are attractive to M. opercularis. Approach frequency and the total duration of approach during a 10-rain pe...

Suppose that water towers like those shown in Figure 1 are initially filled with water and have the same volume, height, and cross-sectional outlet area. Which one empties first? This problem arises naturally when designing watersupplying tanks or funnels. We find a formula expressing the emptying time as a function of the volume of liquid and its initial height. We compute the emptying time fo...

Interactive sonification can provide a platform for demonstration and education as well as monitoring and investigation. We present a system designed to demonstrate the facilities of the UK’s most advanced large-scale research wave tank. The interactive sonification of water waves in the 'ocean basin' wave tank at Plymouth University consisted of a number of elements: ocean wave generation, acq...

In this study, we investigated the effect of hull dynamics in shallow water on the hydrodynamic performance of rowing shells as well as canoes and kayaks. An approach was developed to generate data in a towing tank using a test rig capable of reproducing realistic speed profiles. The impact of unsteady shallow-water effects on wave-making resistance was examined via experimental measurements on...

We consider a 1-D tank containing an inviscid incompressible irrotational fluid. The tank is subject to one-dimensional horizontal moves. We assume that the horizontal acceleration of the tank is small compared to the gravity constant and that the height of the fluid is small compared to the length of the tank. This motivates the use of the Saint-Venant equations [5] (also called shallow water ...

In this project, we have worked with an indicator on automatic water level controller. When looked up our topic the internet, realized that most of projects used microcontrollers or IC 555, but didn’t include any these circuits in model. Our design is based LM324N IC, which functions as a rectifier, oscillator, and comparator. On foundation, construct circuit, model successfully executed at min...

Goldfish scooping is one of the traditional Japanese play. In general, people scoop goldfish in a shallow water tank using a fragile water-thin dipper. In this paper, we describe virtual goldfish scooping system using haptic device and stereoscopic display.

Consider a rectangular tank containing an inviscid incompressible and irrotational 'uid. The tank is subject to a one-dimensional horizontal move (the control) and the motion of the 'uid is described by the shallow water equations. By means of a Lyapunov approach, control laws that stabilize the state of the 'uid–tank system are derived. Two classes of control are considered: full-state feedbac...

A simple effect one stage ammonia-water absorption cooling system fueled by solar energy is analyzed. The considered system is composed by a parabolic trough collector concentrating solar energy into a tubular receiver for heating water. This is stored in a fully mixed thermal storage tank and used in the vapor generator of the absorption cooling system. Time dependent cooling load is considere...

A detailed study was carried out in Jannapura tank near Bhadravathi town of Shimoga district on physico-chemical parameters, fish diversity, aquatic macrophytes and Plankton composition during January to December 2008. The results of physico-chemical parameters were compared with Bureau of India Standards (BIS) and World Health Organization (WHO) standards. The study revealed that, tank water i...