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Electronic matchmaker

23.05.2000

The cunning Japanese have developed and put on sale a very original device - an electronic matchmaker. The small-sized device (9x4 cm) is equipped with a microprocessor and a transceiver with a range of about 20 m.

Having bought such a toy, men and women program it by entering their main "parameters", as well as requirements for a partner. In addition, they indicate the purpose of dating from an innocent desire to chat to serious marital intentions. Then the owner of the toy turns it on, puts it in his pocket and goes outside. The girl of his dreams comes towards him with the same electronic device. The devices enter into communication and, if their programs coincide, they give an audible signal. And then everything develops according to the eternal laws of nature.

The instrument has become popular. They are also interested in some European countries. So we are on the threshold of a new revolution in the field of communication between people.

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Bees warn each other of danger 31.03.2016

Biologists from the University of California at San Diego (USA), led by Professor James Ni (James Nieh), together with colleagues from the Chinese Academy of Sciences, have established that Asian honey bees have a complex system of signals that warn other individuals of the threat. At the same time, it turned out that the frequency of vibrations and the pitch correlate with the level of danger.

Six years ago, James Nee discovered that the European honey bees Apis mellifera have a special signal that stops other bees from going for pollen if there is a danger near the food source. The scientist then wanted to check whether there is something similar in bees of other species.

Asian bees Apis Cerana became an ideal object of observation. In addition to "standard" threats such as spiders, giant Asian hornets Vespa mandarinia and Vespa velutina often attack their hives. During the experiment, scientists simulated the attack of these natural enemies of bees on their hive.

“We hypothesized that larger predators would pose a greater threat and change the signaling, possibly causing the bees to produce more signals. However, we were very surprised to find that these Asian bees not only produced more stop signals, but also different their species," said Professor Nee.

The attacked bees stopped their characteristic "dances" - swaying and began to produce stop signals, and the intensity of their themes was higher, the larger the attacking predator was. In addition, sentinel bees and bees returning from the fields warned their fellows in the hive of the danger outside.

Experiments have shown that different types of danger signals elicit different responses. If the hornets attacked bees in the field, they produced a signal that slows down flights for flower nectar, and in the event of an attack on the hive, the bees warned each other about the danger outside.

Professor Nee says this is the first time such a complex system of danger signals has been discovered in insects. Previously, the presence of such signals was recorded only in mammals and birds.

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