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Official blog of the «Radeko Group» LLC : News

19 July 2012 News

Megafon launches 4G network in Moscow

 

Following Yota, Megafon has launched its LTE network services. The operator expects 50 thousand of its customers in Moscow and the region to be using the 4G network by late 2012.

Megafon has announced the launch of a 4G network in Moscow. The operator says, apart from a higher mobile internet speed as compared to earlier generation networks, the great advantage of the 4G network is its compatibility with 3G and GSM networks. The two latter will fill in where the 4G network is not available.

The company says over 1 thousand 4G base stations operate in the region and their number will grow to 3 thousand by the year end. Head of Megafon’s Moscow branch Andrey Kurdanov says the company injected around 700 million rubles ($23 million) for the 4G network infrastructure and development.

The company has been actively working on the equipment to support the 4G network. Recently the operator’s first modem supporting 4G has appeared on the market. It is going to start the sales of Samsung Galaxy Tab 8.9 LTE Megafon Edition 4G tablets. It will sell at around 30 thousand rubles ($1000).


Moscow has become the second city where Megafon launched its 4G network. Next on the list are Krasnodar and Sochi.

 

“We are expecting about 50 thousand of our customers to be using the 4G network by late 2012”, says Natalia Spitsina, Megafon Moscow Commercial Director. Megafon will also launch its 4G network in over 20 cities around Moscow, such as Khimki, Podolsk, Korolyov, and Mitishchi.

Megafon is the first operator of the Three Big (Beeline, MTS, Megafon) that has launched a 4G network in Moscow. It previously launched similar services for its Novosibirsk customers; there it shares the LTE infrastructure with Skartel (Yota brand). The companies agreed on that in 2011. The Novosibirsk network was launched in April and has become the first commercial 4G network in Russia.

Earlier Megafon said it would launch the 4G network in Krasnodar and Sochi within the first half of 2012 and in St Petersburg, Samara, Vladivostok, Ufa, Kostroma and other cities within the second half of 2012.

On May 10th Skartel had launched an LTE network in Moscow by resetting its WiMAX network. Megafon and Skartel use the same infrastructure for their 4G services in Moscow.

 

Источник: Cnews



19 October 2011 News

iphone 4S maintains GLONASS

 

Russian Global Navigation System (GLONASS) is listed among navigation systems in oficial technical characteristics table of iphone 4S. Previous editions of iphone didn't maintain GLONASS*

 

*GLONASS is one of the two exsisting global navigation systems together with US NAVSTAR GPS



18 October 2011 News

LED color chart, characteristics and best for.

While there are many variations of white LED light available today, they all fall under three basic categorical descriptions: “warm white,” “pure white,” and “cool white.” At opposite ends of the chart are “warm white,” which is a yellow tinted white light, and “cool white,” which displays a tint of blue. In between is “pure white” which, as the name suggests, is pretty much the most pure form white LED light available.

Only white and blue lights are measured in this sense; LEDs not in the white-blue spectrum do not.

Despite the fact that LEDs produce light by a process other than heating, we still use correlated color temperature (CCT) when describing the appearance of the LED as it relates to the appearance of a black body radiator (in this example, that would be the piece of metal). The CCT, in this sense, is simply the closest point on the black body curve to a particular color as defined by its chromaticity value.

Different temperatures = different colors

When the glow of the white LED light is slightly yellow, it’s typically around 3000° Kelvin (K). Due to the yellowish tint of the light, this particular color is referred to as “warm white.” Further up the scale, “pure white” LED light measures at around 4500°K and even higher up is “cool blue” white light, which displays a reading of 6500°K or more.

 

Naturally, there’s some confusion over this. If the temperature is low, why is it considered “warm?” And if it’s high, why are we calling it “cool”?

You must consider the answer to this in the visual sense of how we’re using the words. The human mind has been conditioned for thousands and thousands of years to agree that the color yellow indicates warmth and blue means cool. As such, the words “warm” and “cool” are simply adjectives used to describe the type of color being emitted.

Examples

There are a ton of white light examples all around us that can be applied to the color temperature scale. The temperatures listed below are approximate (so save yourselves the hate letters, Kelvin enthusiasts):

White light at:

• Sunrise/Sunset: 2500°K
• Early afternoon sunlight: 5000°K
• Overcast sky: 6000°K
• Shade from blue sky: 7500°K
• Blue sky: 10,000°K +

Here’s how this translates visually:

Things to keep in mind when purchasing a white LED light

Higher color temperatures do not necessarily indicate a higher quality, or more expensive light. It also doesn’t mean that it’s any brighter than others. Variations in diodes largely affect the price of the products, not the LED’s color temperature range.

Also keep in mind that LEDs aren’t perfect. Every diode has a slight variation on their color temperature. Cheaper and less quality LEDs have a fairly wide color temperature range. For example, a warm white LED could range between 3000-3500°K. This is a pretty significant difference. High quality LEDs, on the other hand, have a somewhat tighter range, often times just 150°K difference.

Why is this important? Unexpected variations in white light could turn out to be quite noticeable depending upon how the LED is being used. Warm light is best used in living spaces as it tends to be more flattering to clothing and skin tones. Cool light, on the other hand, is preferred for visual tasks, as it produces excellent contrast. For best application practices, keep in mind these easy-to-remember basics:



6 October 2011 News

Be a yardstick of quality. Some people aren't used to an environment where excellence is expected. Steve Jobs RIP

Steve Jobs (1955 - 2011) RIP

October 5-th Apple announced the death of its chairman and former CEO because of long-term cancer. 

“Steve’s brilliance, passion and energy were the source of countless innovations that enrich and improve all of our lives,” Apple said. “The world is immeasurably better because of Steve.”



6 October 2011 News

US communication satellite succefully launched to the orbit from the booster "ZENITH-2sB"

 

7.35  AM MoscowTime from the Bakonur aerodrom US communication satellite  "INTELSAT-18" had been succefully launched to the orbit from a booster "ZENITH-2sB" . The satellite will transmit signals on the North America, Australia, Oceania, Eastern Asia. The satellite has 24 C-band transponders and 12 KU-band transponders. Satellites lifetime - 15 years, weight - 3200 kg, load field capacity - 4,9 kilowatt.



4 October 2011 News

Boston Dynamics presents the AlphaDog Proto a lab prototype for the Legged Squad Support System

 

The AlphaDog Proto is a lab prototype for the Legged Squad Support System, a robot being developed by Boston Dynamics with funding from DARPA and the US Marine Corps. When fully developed the system will carry 400 lbs of payload on 20-mile missions in rough terrain. The first version of the complete robot will be completed in 2012. This video shows early results from the control development process. In this video the robot is powered remotely. AlphaDog is designed to be over 10x quieter than BigDog. The field version of AlphaDog will have a head packed with terrain sensors.



4 October 2011 News

GLONASS satellites determine location of objects with an accuracy of 5 meters.

On the night between 2-d and 3-d  of October at 00.15 MT from Pesetsk aerodrom the 24-th GLONASS satellite  had been succefully launched from a booster "soyuz - 2.1 b" .

As RSN radiostation reported since now the GLONASS system determines the location of the object with an accuracy of 5 meters, against previous 50. GLONASS still lags  behind its American counterpart. Its development and improvement is of a great political and social significance.



28 September 2011 News

TI's new 6LoWPAN sub-1GHz solutions deliver mesh wireless Internet connectivity to metering, security, street lighting, building automation and other spaces

 

Imagine street lights that are wirelessly monitored and controlled, enabling city planners to plan bulb replacements and ensure proper lighting for drivers if weather conditions change. This and other great things will be possible with TI's new sub -1 GHz 6LoWPAN technology.

Texas Instruments Incorporated (TI) (NYSE: TXN), the industry leader in highly integrated wireless connectivity solutions, today introduced new sub-1 GHz 6LoWPAN solutions, aimed at providing a gateway for remote, low-cost wireless sensors to connect to the Internet and a wireless extension of wired IPv6 infrastructures. By operating in the sub-1GHz band, TI's 6LoWPAN solutions offer longer wireless range at lower power levels than traditional 2.4 GHz-based 6LoWPAN offerings. The 6LoWPAN solutions support large-scale mesh networks and are suitable for applications such as Smart Grid, security, home and building automation, street lighting and other wireless sensor networks. The new product family includes the CC1180 network processor, CC430  complete system-on-chip (SoC) microcontrollers, 6LoWPAN software stack, and CC-6LOWPAN-DK-868 development kit.



26 September 2011 News

TI introduces 36-volt op amp for the automotive market

Micro package option is 50-percent smaller than competitive devices

introduced an automotive-qualified 36-V, single-supply, low-noise op amp (operational amplifier) that can operate on supplies ranging from +2.7 V to +36 V. The OPA171-Q 1offers high-precision performance in a cost-effective, low-power device. In addition to industry-standard packaging, the device is available for automotive qualification in the SOT-553 micro package, which is 50-percent smaller than comparable devices available today, and can reduce board space for automotive applications including HEV/EV, tracking amplifiers in power modules, and transducer amplifiers.



26 September 2011 ExpositionsNews

Robotic Orchestra Hits Right Notes for Industrial Control

The tech world is rife with conductors, but this one has nothing to do with transmitting heat, electricity or light. In this case, the conductor leads a robotic orchestra.

Dubbed the Intel Industrial Control in Concert, this machine-to-machine-controlled collection of digitally connected vibraphones, xylophones, high-hats and other sound-making devices is intended to demonstrate the simplicity of building a state-of-the-art smart system using off-the-shelf technologies based on common x86 chip architecture, according to Intel's Drew Pool.

The orchestra's conductor is a palm-sized computer motherboard powered by an Intel Atom processor surrounded by dozens of wires and white PVC tubing that snakes from one instrument to the next. The crowd-pleasing project cost approximately $160,000 to build and debuted at the Intel Developer Forum in San Francisco.

 



21 September 2011 News

Military satellite "Kosmos-2473" launched into orbit

 

On wednesday 2.47 am MT  from airdrom Baikonur (Kazahstan) booster "Proton-M" took off, then at estimated time 11.53 MT a satellite owned by Russian Ministry of Defense was launched into orbit. From Earth satellite will be operated by The Main testing senter of check-outs and operating of space crafts named after Titov. Launch and leading out of a satellite were in a normal mode. That was a first launch after an emergency starting of a cargo spacecraft on August 24. 

 




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