close

SCIENCE

SCIENCE

Plantagon skyscraper-greenhouse will feed 5,000 people a year

neboskreb.jpg

Skyscraper

The “The World Food Building” project has been implemented for more than half – in 2012, the Swedish company Plantagon started construction of a new type of city building in Linköping. To put it into operation it is planned in 2020 and it will become the first house-garden of the XXI century, which has a purely practical purpose. Here food is grown.

The idea is simple – to build in the middle of a large city a vertical complex of greenhouses with vegetables and berries to feed the townspeople. The issue in the implementation – the Swedes from Plantagon have developed a project that is completed and approved by the authorities at a cost of $ 40 million. Not so much, given the real estate prices, plus this building will be able to generate fresh products for 5,000 people a year – this is the population of a whole residential area.

Skyscraper

Skyscraper-garden (plantscraper), as it is called, looks like a high-rise building, the floors of which are entirely filled with greenhouses. Everything works on hydroponics and is controlled by automation, beds with plants are isolated from the polluted urban environment. But at the same time they are actually within walking distance from consumers – if you put one green skyscraper in each district, the logistics costs for delivering fresh products will be reduced to a minimum.

Food for 5000 people a year is the calculated parameters, the reality can be different, both in the best and the worst side. The building needs a significant amount of electricity and water, which will create a load on the urban infrastructure. However, vegetables can be grown at a flexible pace, responsive to demand.

Skyscraper

read more
SCIENCE

The loss of a smartphone for a Briton is much more trouble than Brexit

devushka-i-smartfon.jpg

Girl and smartphone

According to a recent study by the British Physiological Society, for adults in the UK, the loss of the “native” smartphone delivers far more unpleasant experiences than the notorious Brexit. During the survey, participants were asked to assess the degree of stress significance of 18 different life situations on a scale of 0 to 10.

The loss of the smartphone was on the 14th place with an average score of 5.79, which is slightly higher than 3 months ago – 4.23, but less compared to the terrorist threat – 5.84.

The results of the survey indicate that the level of stress increases with age, especially when it comes to illness or the danger of being imprisoned. The possibility of losing a smartphone is more of a concern for young people. For them, this is an additional problem, such as the appearance of the first child.

Another rather sad conclusion of the survey is the growing “smartphone dependence”. 90% of respondents said they literally panic if the level of charging their gadget drops below 20%.

read more
SCIENCE

Fast and hard – the Subaru car descended the track for the bobsled

subaru-wrx-na-bobslejnoj-trasse-IQCB.jpg

Subaru WRX on the bobsleigh track

The Olympic bob glides along the narrow and swirling ice track, a sports car is created for driving on the smooth asphalt of a spacious highway. Does it make sense for the second to get into the territory of the first one and try to arrange a demonstration race? In Subaru did not begin to ask philosophical questions, and simply invited driver Mark Higgins. And he did it.

The first and last of its kind, the race took place on the official track for bobsled in the Swiss St. Moritz. Hardly there are many who want to repeat the trick – during the descent, the car and the oldest bobsleigh track in the world were seriously damaged. But spectacular shots were made for the new advertisement of the automobile brand.

Subaru WRX on the bobsleigh track

To charge the model Subaru WRX STI squeezed into a narrow chute, it removed the side mirrors , mounted new body stiffeners, strengthened the weather cloth and replaced the fuel tank with its miniature version. The car was shod in forbidden WRC tires with a width of 137 mm, with 7 mm spikes, 420 pieces per wheel. And we pumped them up to 3,4 bar.

Subaru WRX on the bobsleigh track

Higgins tried very hard, but in extreme conditions he could not save the car from several serious collisions. From the tragic consequences, the friable snow of the fence and the skill of the rider were saved. And the most spectacular moment was the turn with the exit to the vertical and forced maneuvering on two wheels after it. As they say, do not try to repeat it at home.

read more
SCIENCE

Magnetic pedals will not let the bike fall in the parking lot

magnitnye-pedali-pedal-park-3iVf.jpg

Magnetic pedals Pedal Park

An entrepreneur from Taiwan, Sumchi Wu, came up with an original addition to the bike in the form of magnets mounted in the pedal, with which he can be parked, or rather “glued” to metal objects, such as street lights or pipes.

Sumi Wu has already set up a campaign in Indiegogo to finance the project. A pair of pedals with magnets from aluminum alloy will cost $ 45, and in the plastic version – only 30. In addition to the pedals, there is a parking “point” – a metal wall plate, which is attached to the home parking.

Magnetic pedals Pedal Park

For sure, many cyclists will appreciate the simple, but very useful invention of the Taiwanese inventor, called Pedal Park. In combination with high-tech “smart” anti-theft locks , which do not need to be mounted at each parking lot, the use of bicycle transport is more convenient than ever.

read more
SCIENCE

Wi-Fi in infrared light was 100 times faster

svetovoj-wi-fi.jpg

Light Wi-fi

With all the undoubted merits of home Wi-Fi, it still begins to take positions with an ever-increasing flow of information. Researchers from the University of Eindhoven have found a unique solution, creating a wireless network based on safe infrared rays. Its potential is huge – the speed is more than 40 Gbit / s, plus there is no need to allocate a separate channel for each connected gadget.

The principle of the system is quite simple. Data in wireless mode comes from several antennas located, for example, on the ceiling, and capable of precisely directing light rays.

There are no moving parts in the system, it does not need maintenance and energy. The antennas include a pair of gratings that emit light rays with different wavelengths for different angles.

The network closely follows the exact location of each wireless device, responding to the radio signals emanating from it. When a new device appears in the coverage area of ​​the same antenna, the new subscriber is switched to other wavelengths. As a result, it is not necessary to “share” the channel with “neighbors”. In addition, the technology eliminates interference from neighboring networks in traditional Wi-Fi .

It is worth noting that infrared radiation has no effect on the retina, so the technology is absolutely safe for humans.

read more
SCIENCE

In Russia, a two-body transport aircraft is being developed

stendovaya-produvka-dvuhfyuzelyazhnoj-modeli.jpg

Blowdown of a two-body model

The authors of the unique Russian design are the engineers of the Central Aerohydrodynamic Institute named after Zhukovsky (TsAGI), where new test benches are currently being tested.

As studies show, planes with two fuselages are easier to take off, they have less bending moments of the wing than conventional ones, and in order to take off they cost less thrust. And they need only three engines, that is, one less.

The loading and unloading of the transport “two-body” will take less time, while the process itself becomes easier and more convenient. If earlier the transportation of the personnel and combat equipment of the landing units was carried out by different aircraft, now all this can be delivered to the landing area “in one bottle”.

There is also a civilian option for regional aviation of dual purpose. If necessary, he will be able to transport passengers (up to 50 people) or cargo (up to 6 tons), respectively, to 1500 and 1000 km.

read more
SCIENCE

Japan closes an experimental nuclear reactor at the cost of 9 billion dollars

reaktor-mondzyu-EzE5.jpg

Mondju reactor

A nuclear fast neutron experimental reactor or Monduyu breeder reactor was commissioned in Japan in 1995. Its main feature is the ability to convert uranium into plutonium, which can then be used as fuel for nuclear power plants with traditional reactors and even for the production of weapons-grade plutonium.

Fast neutron reactors also benefit from the fact that the U238 isotope used in them is 99% of the total uranium produced. This means that with its help it is possible to process practically useless “crude” uranium ore in the most valuable nuclear fuel.

However, Japan’s nuclear installation, which was so necessary for Japan, almost immediately began to suffer setbacks. Just a few months after the launch at the Mondju reactor, a large sodium leak occurred, which resulted in the release of toxic gases and damage to part of the reactor. As a result, it had to be taken out of service until 2010.

Mondju reactor

But even after the restart in 2010, serious problems emerged. In particular, it turned out that part of the reactor was not subjected to the necessary technical checks for a long time.

It is estimated that the full restoration of the reactor would have cost $ 4 billion, with a total cost of $ 9 billion, resulting in the Japanese government decided to stop it and sell it later.

But this does not mean that Japan completely abandoned fast neutron reactors. It is reported that a decision has already been made to build a new installation instead of the Mondju reactor, even despite the curtailment of many nuclear projects after the accident at the Fukushima nuclear power plant .

read more
SCIENCE

Vanishing nano-ink for medical tattoos created

krasitel-dlya-nanotatuirovok.jpg

Dye for nano-tattooing

Not everyone knows that in addition to body art tattoos, there are medical tattoos. Doctors use them to indicate the place of treatment, in particular, the type of skin cancer – basal cell carcinoma. True, the ink used for this purpose causes some problems. Recently, researchers have created a special paint that glows in special lighting and after a few weeks disappears without a trace.

Patients with skin cancer are sometimes forced to wait for three months between a biopsy that analyzes their condition. In order to mark the skin area, which is subject to the next stage of treatment, carbon, graphite, mascara or fluorescent dye is usually used. In the future, to get rid of them had to resort to laser or surgical removal, which is an additional burden for the patient who underwent the operation.

A group of Chinese researchers, including Kai Chen, Gary Zhuang, Hsian-Rong Zeng, developed a safe version of the dye by cross-mixing fluorescent nanoparticles. In ordinary light, such particles are not visible, which allows to eliminate unwanted markings on the skin. But with a light with a wavelength of 460 nm, the pigment begins to glow. Experiments on mice have confirmed that nanotaping does not cause inflammation and completely disappears after three months.

read more
SCIENCE

A foldable paper-based biobacket was developed

skladnye-bumazhnye-batarei-76Uk.jpg

Foldable paper batteries

A team of researchers at Binghamton University (New York) has been developing paper fuel cells for years now, where specific bacteria perform the function of the electrolyte. After the original prototype of the folding battery, a more powerful version was created – in the form of a star ninja. Currently, the team is busy searching for a practical form based on a paper sheet, which can be folded in different configurations.

In the latter version of the device, instead of the deposited nickel cathode, a new original design was proposed-with a nitrate of silver deposited under a thin layer of wax. Water with bacteria, placed inside the reservoir from the conductive polymer, performs the function of the anode. The anode and the cathode are placed on opposite sides of the paper sheet. When they come into contact as a result of cellular respiration, microbes begin to produce electricity.

Foldable paper batteries

By stacking such sheets in different configurations, different power and current can be obtained. So, for example, 6 sheet batteries (variant 2 x 3) give out 31.51 μW / 125.53 μA, and already with the variant 6 × 6 – 44.85 μW / 105.89 μA. Of course, this is not enough for the smartphone, but for low-power biosensors, determining the level of sugar in the blood, it is enough.

read more
SCIENCE

Algeria opened the first in the country clinic for the treatment of Internet addiction

polzovatel-seti-62n1.jpg

Network User

The Bakhir Mentouri Clinic in Constantine, Algeria, launched the country’s first rehabilitation program for people with Internet addiction.

The clinic pays special attention to compulsive users of social networks. Since the launch of the program in May 2016, its participants have become more than a hundred people aged 15 to 40 years. In the most severe cases, patients almost could not tear themselves away from the Internet, even to eat or take a shower. Among the external consequences of the disorder, doctors note headaches and spinal pains, aggressiveness and anxiety, if the patient is not given the opportunity to go online.

In addition to therapy, the clinic also conducts a public education campaign, the purpose of which is to draw attention to the urgent problem. Algeria has a high level of youth unemployment, only 25% of people under the age of 24 have any job. Often, the only place where young people can get together is 24-hour Internet cafes, which further exacerbates the problem .

The assistance program includes music and physical therapy, as well as meditation and group and individual sessions with a psychologist. All funding for the project hospital receives from the state.

read more