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Ant lion　4

A researcher visit to me: he is a specialist for Ant-lion in Japan

I got documents from USA via T.Matura( Kyoto University of Education , for ant-lion（http://www.brh.co.jp/s_library/j_site/scientist/matsura_t/）. It was a interesting article that a explained why he are sorting the grain by a theory and an experiment by resistance of air when the particle which it hit, that a ant-lion did in being uniformly excellent and put up flew in the air. The theory is based on a calculation where fly for a particle for example 45 °threw. A big particle is flies in far-off, even if I throw it in the same initial velocity by influence of air resistance, but small particle falls near. Resistance of air is different in laminar flow level and turbulence area, but this article asks you a level between the inside that in detail. This is a theory of velocity of the wind in industry, but it is not done practical use in industrial world. Author of the book of one documents quoted in reference in his report was an expert of the chemical engineering , prof. Bird, who visited to my laboratory. As for the initial velocity when ant lion gave it up, that it would be about 1m per second was checked by an experiment. An ant lion has two technology , screening and air separator, and ascertained that the velocity is about 1 meter per sec. It is a very interesting experiment, I want to have come to try.

Slope control mechanism

(A slope controlling technique of on his position )

At a central part, he opens the scissors, which play a censer of adjustment at an angle of the slope. This is posture to his attack on his next game. Not only he observe it well, he supports a bottom end of slope, he perceive surely by the outside of scissors. He have 7 eyes each side, then total 14 eyes probably seems to be a fisheye lens are watching all directions of a slope. I think that, he takes in a pressure change of a slope hanging to these scissors in addition to visual monitor.

In other words scissors is a censor to control the slope, and by the action open or close and destroy the stability of the slope and pull the game to the bottom. In other words, the scissors is a censer to control the slope, and and destroy the stability of the slope by the action of open or close, and pull the game to the bottom. He do not wait for fall down of a ant naturally. I am only to admire his clever action.
A big hourglass which flow 24 hour sandglass in universiy
By chance, at that time, my job is development of 24 hr sand glass. The upper part becoming big hollow just like hour glass, which is looks very much alike. Accidentally, above-mentioned Mr. T.Matura, who visited my laboratory surprised very much. "Oh, is it a what big ant lion!!" he cry loudly, as is often the case for an expert. Angle of repose varies with the humidity of air sensitively. When high humidity, give a somewhat big angle. As for the ant lion, what kind of thing can be know? It is an interesting thing, which we want to know. When a mixture of the coase sand and fine sand, when flows through a slope, grain segregation can be occur. Fine sand or clay are through the between of a coaser grain, sinks to a bottom of the flow. It call grain segregation phenomenon.　The coarser particle drops in central part of a nest, if it holds continuously jump it, then comparatively stable stratum is formed at under layer. This because an always of an ant lion, and the, I think that there is the state that comparatively coarse sand accumulates on the surface, and, is easy to flow through. I was interesting if I tried to examine it in detail. When he becoming cocoons , when his chrysalis time, he make a ball shaped a cocoon by hardening sand and soil. It is a hollow globe of a diameter of around 1cm, but, this is the device how dynamic strength is strong enough. Even if there is a small landslide, he may cannot be buried in the earth. There is another a wonder of a one ant lion. It is shown the photograph that Prof.Matura show in our magazine June, 1985 issue. He is a perfect constipation. His bowels reaches, and it become dead end. He is are complete constipation animal. After he relieve himself, how are very refreshing.

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