In this paper, we propose a novel tactile display by controlling suction pressure. The method is based on our discovery of an illusion that pulling a skin through a hole creates a sensation as if a stick is pushing the skin. Based on this property of perception and multi-primitive stimulation method, we confirmed that we can produce tactile sensation from concentrated pressure to smooth surface...

The influence of soil temperature and moisture on Meloidogyne incognita (Kofoid and White) Chitwood was examined in relation to hatching and survival of second-stage juveniles (J2). Nematodes were cultured on cotton (Gossypium hirsutum L. cv. Acala SJ2) under field conditions to provide populations similar to those found in the field in late autumn. Egg masses were placed in a temperature range...

The aims of the study were to analyse the concentration of nitrate and ammonium ions in soil solutions obtained using MacroRhizon miniaturized composite suction cups under field conditions and to determine potential nitrogen leaching from soil fertilized with three types of fertilizers (standard urea, slow-release urea, and ammonium nitrate) at the doses of 90 and 180 kg ha-1, applied once or d...

Suction feeding fish rapidly expand their oral cavity, resulting in a flow of water directed towards the mouth that is accompanied by a drop in pressure inside the buccal cavity. Pressure inside the mouth and fluid speed external to the mouth are understood to be mechanically linked but the relationship between them has never been empirically determined in any suction feeder. We present the fir...

Based on the experimental work of a refrigerator compressor with soft suction structures, the new soft suction structures were put forward. The performance of the compressor and the frequency properties of noise were also studied by means of tests. The results showed that these structures could reduce the noise of compressor. The main experiments included refrigeration capacity, COP, vibration,...

BACKGROUND A pleural drainage system must be capable of efficiently evacuating the air or fluids from the pleural cavity so that adequate lung reexpansion can take place. The air flow and negative pressure of the system will depend on the particular design of each model. This experimental study analyzes the specifications and performance of the pleural drainage systems currently on the market. ...

Many slope failures have been observed in deep-cutting gorges Southwest China due to rainfall events. This study conducted model-based tests of the failure a gently dipping accumulation caused by intermittent rainfall. The physical model was established configuring soil samples based on similarity theory and direct shear test data. Intermittent simulated supplying surface runoff bottom pressure...

The effect of matric suction on S-wave velocity (V s ) unsaturated soils has been observed to show different trends from the Vs relationship with effective confining pressure. In some soils, increase in per unit stress change (u a -u w is greater than pressure (σ’3) for saturated and dry vice versa other soils. this study, difference was examined through state variables similar soil samples. Ex...