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Unmanned amphibious aircraft to deliver mail to the island

05.07.2019

The Chinese company UVS Intelligence System tested its unmanned amphibious aircraft by delivering mail to one of the islands of the Shensi archipelago.

The U650 unmanned seaplane, developed by UVS Intelligence System, is based on the Spanish Colyaer Freedom S100 ultralight seaplane. The wingspan of the U650 is 12,4 meters. The device is capable of flying at a speed of 190 kilometers per hour.

Flightglobal, UVS Intelligence System tested the U650 - delivering mail to one of the islands of the Shanxi archipelago. As part of the test, the U650 flew from Shanghai to the island with a load of 200 kilograms, spending 52 minutes in the air (delivery of mail by boat, by comparison, takes about two to three hours).

Technology developed to extract water from the moon
06.07.2019
Water is an important resource for space exploration because it can be chemically separated into hydrogen and oxygen, which can then be used as rocket fuel. The possibility of refueling rockets on the Moon will open up new horizons for humanity and reduce the cost of flights beyond the orbit of the satellite.

In the past, scientists have already proposed to start mining the lunar soil: using heavy equipment, dig out ice blocks from the regolith and melt water from them on the surface. However, Phil Metzger and Julie Brisset, who received the contract, have a different idea. They propose to drill deep wells through which heat will be pumped. So you can melt the water frozen in the regolith, which will rise up in the form of steam. This method requires less equipment, it is simpler and more reliable.

"When it comes to delivering cargo into space, mass matters," Metzger said. Representatives of the United Launch Alliance agree with this, who considered this method quite realistic and cost-effective.

"Getting propellant on the Moon could be significantly cheaper than transporting it from Earth with its high gravity," said Bernard Cutter, chief scientist at United Launch Alliance. "This, in turn, will reduce the cost of flights by a factor of 5."

The main problem facing scientists now is to determine the correct geometry of the holes in order to increase the volume of the heated zone and the time during which it will retain heat.

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Babies scream in different languages 02.09.2016

It seems to us that babies cry the same way everywhere, and it’s just stupid to talk about any language differences here - newborns can’t even speak. However, in fact, there are differences between them, at least when comparing children from China, Germany and Cameroon.

It's all about the difference between tone and non-tone languages. As you know, in many languages the meaning of a word depends on the sound pitch at which it is pronounced; pitch variations of syllables and words can completely change the meaning of what we are talking about. One example is Mandarin Chinese, including its variety Putonghua, which is an official language in China, Taiwan, and Singapore.

Northern Chinese has four tones. A more complex case is Lamnso, the language of the Nso people living in Northern Cameroon. Nso communicate with each other already on eight tones, and the meaning of each tone is determined by its variations during the pronunciation of a particular word.

When researchers from the University of Würzburg, the University of Osnabrück and Beijing Normal University compared the sounds made by infants whose mothers spoke German, Mandarin and LamNso, it turned out that the cry of "tonal" children was different from the cries of "non-tonal". Thus, in the cries of NSO infants, the interval between the highest and lowest tone was wider, and the children easily and quickly moved from height to height compared to newborns whose mothers spoke German. In general, the cries of the Cameroonians partly resembled singing.

The same results were obtained when comparing babies from Germanic mothers with babies whose mothers spoke Chinese, only here the differences were not so noticeable - probably because the Chinese language is still "less toned" than Lamnso.

The researchers analyzed the cries of children who were only a day old. New data support the hypothesis that language acquisition by a child occurs already in the later stages of pregnancy: according to the authors of the work, the baby hears the mother’s speech while still in her womb, and already at this time his brain absorbs some pronunciation rules.

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