We have become accustomed to the fact that our phones and other mobile devices receive the data from outside by using wireless technologies such as Wi-Fi and Bluetooth. In recent years more and more widespread to start, and wireless charging technology batteries, but, unfortunately, all wireless chargers, with very few exceptions, work efficiently only on a very small distance. Researchers from the University of North Carolina (North Carolina State University, NCSU) has developed a new wireless system, capable of performing both the above-mentioned functions, it enables you to transfer at a relatively long distance, both energy and data simultaneously, according to dailytechinfo.org.
System wireless charging typically use inductors that emit electromagnetic fields. These fields are converted back into electricity other coils embedded in the phone or mobile device. But the built-in wireless charging system, and systems that can be purchased as optional components require that the phone or device lying on the surface of the charger.
"Recently, our scientists carried out researches have allowed to increase the range of system operation of wireless charging to within inches," says David Ricketts (David Ricketts), one of the researchers, "And this work became the basis for our next step."
In order to provide efficient power transfer, wireless systems use very narrow-band signal that is not very well suited for providing high speed data transmission. The new system uses two signals of the same range, all transmitted energy is concentrated within a narrow band, and the rest is used for data transmission. In addition, to increase the speed of transmission, the researchers used additional methods, such as automatic alignment of the channels.
"Previously it was thought that for effective wireless transmission of energy require extremely narrow-band transmitters and receivers," says David Ricketts, "We showed the possibility of creating a broadband, narrow band which is allocated for transmission of energy. This system is inherited all the best features of existing systems for wireless charging and wireless information transfer".
During tests, researchers were forced to work their system in different modes, in the mode of energy transfer in the mode of simultaneous transmission of energy and data. The distance between the transmitter and receiver was 16 inches and through a wireless "energy" channel siphoned energy, with a capacity of 3 Watts. At this level of energy transfer additional data transfer reduced the overall efficiency of a wireless charging 2.3 percent, while transmitting 2 Watts of energy efficiency fall was only 1.3 percent.
"Our experimental data show that our system is as effective as existing devices for wireless charging. And now we'll do the design of the new system, which, at the same time charging the battery will allow you to watch movies from the Internet," says David Ricketts.
The group of students of NSU has created a unique encryption algorithm that is uncrackable. According to the developers, it has three features: veroyatnostnoe, symmetry and size.
The project was presented at the international conference on programming Big Data Conference. The students say that the new product allows you to securely protect information and personal computer from any unauthorized access. Spokesperson of NSU reported that when encrypting the same text with one key, the encrypted message each time will have a different structure.
This option significantly complicates the cracking of the algorithm, including the use of a quantum computer. The method according to experts is the most urgent for the Internet of things, as well as when working with large volumes of data Big Data.
Experts in the field of energy efficiency explain: each family by adhering to simple rules, can pay for electricity by 30-60% less.
Let's try to at least roughly figure out how much electricity appliances consume.
By and large, if you count roughly and approximately, it depends on the power supply unit and specific job that the computer is currently executing. The declared output of block 350 to 550 Watts, it is unlikely to consume all of it even in full load. We can also add a monitor from 60 to 100 Watts. Thus, the average power supply of 450 Watts, and the monitor consumes 100 Watts or 550 Watt 0.55 kW of electricity per hour. Again, these figures are highly inflated. For an approximate calculation it is possible to take almost the maximum value is 0.5 kW/h – not to be mistaken. When using a computer 4 hours per day receive 60 kWh per month. Accordingly, when using 8 hours per day is 120 kWh, and so on.
The energy consumption of refrigerators is calculated for 365 days for 220V/50Hz. For 100 l of usable volume per day, it allows you to compare different size refrigerators. Again, the amount of power consumed depends on the amount of fridge and the amount of product stored in it. Also the mark is applied, the external environment changing depending on the time of year. In the data sheet on the refrigerator indicates the energy consumption per year. In most cases, this number ranges from 230 to 450 kW/h. By simple calculation, dividing this figure by 12 months, obtained from 20 to 40 kW/h. Again, the number specified is applicable only for ideal conditions. In reality, however, is unlikely to achieve this value.
TVs are different. A modern TV with a cathode-ray tube consumes 60 to 100 W/h In average, the calculation will take 100 watts/h While watching TV 5 hours per day – 0.5 kW/h 15 kW/h LCD televisions with a fairly wide screen consume about 200-250 watts per hour. Not the least role in this plays exhibited brightness. Accordingly, the number of wasted kilowatt hours per month should be multiplied by 1,5. It turns out from 20 to 35 kW/h. Small LCD TVs consume about the same as and TVs with a CRT, or a little less: 50 to 80 W/W – 8-12 kWh per month. Plasma TVs with large screens consume 300 to 500 Watts per hour. If you have several different TVs – sum values.
The power consumption of a washing machine – not a constant value, and depends on the washing mode, the masses of linen and the type of material. On average, the stated capacity of most washing machines is from 2 to 2.5 kW/h However, rare cars consume same amount of energy. For calculations can take from 1 to 1,5 kW/h. In the wash 3 times a week for 2 hours, received from 24 to 36 kWh per month.
Kettle and iron
Real monsters consumption in the apartment is a kettle and iron. Working the minimum amount of time, they consume almost as much electricity as some running the entire month devices. With the power of the kettle from 1.5 to 2.5 kWh, using it 4 times a day for about 5 minutes, we get 20 to 25 kWh per month. Iron is almost the same story. The power he is about the same as that of the kettle, and if iron 3 times a week for 1 hour, you get 25 – 30 kWh per month.
It is only the most famous consumers of electricity in your apartment. And then there are the microwave ovens, vacuum cleaners, dishwashers, chargers of mobile phones and laptops. Not to mention the incandescent lamps, which, depending on their number, power, and time of combustion, can take from 50 to 100 kWh of electricity consumed per month.
As a result, by simple addition, we obtain approximate flow rate of 200 to 300 kWh per month.
Government of Macau signed a strategic agreement with Chinese Internet giant Alibaba on the creation of smart cities on the territory of the administrative district.
From 2017 to 2019 a division of Alibaba Cloud will implement digital technologies in the spheres of tourism, health, transport and public administration. Also, Alibaba will launch in Macau of the educational program for training specialists in cloud computing and e-Commerce.
Macau known as the Asian Las Vegas because of the great popularity of gambling and as a result, a large flow of tourists. Casino other slot entertainment bring near record profits. In July, the revenues from casinos totaled $2.86 billion New it infrastructure is going to be good for business and will benefit both local residents and tourists.
Alibaba already has experience of creation of digital cities in China. In Macau, the Internet giant plans to use AI for regulating road, sea and air transport, as well as to apply big data to create tourist routes.
The Chinese company already has successful experience of creation of intelligent transport systems.
In Hangzhou, Alibaba launched a project of City Brain.