Archive | May, 2011

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Latest Cooling System From NASA

Posted on 30 May 2011 by yizhan

Have you ever wondered about the source of the buzz that comes from your computer? Likely to be a fan, trying to ventilate the internal components. This is a typical cooling system.

I am not a rocket scientist, but in general, such as electronic components become tinier and more powerful, the amount of heat they generate is proportionately higher. This is because the simple fact that there are simply not enough surface area for heat to spread quickly. Therefore, all the computers processor and high-end graphics cards come with a heatsink with a fan on top. Take off the radiator and you cook the ingredients in seconds.

However, little progress in the equipment room where no air or moisture to help conduct heat and you have an even greater challenge. And that is exactly what NASA has been exposed.

According to NASA, Jeff Didion, thermal engineering Goddard Space Flight Center, and the electronics, thermal control is always one of the limiting factors. He co-Jamal Seyed-Yagoob, Professor, Illinois Institute of Technology in Chicago, a partner with SU Air Force and the National Renewable Energy Laboratory to find ways to push the envelop thermal-control barriers.

The new cooling device of the future from NASA.

(Credit: NASA)

The result is the new electro hydro dynamic (EHD) technology-based thermal management, revealed yesterday that promises to make it easier and more effective to remove heat from small spaces. This solution is designed to meet a particular challenge for engineers to build advanced space instruments and microprocessors, which can fail if the heat they generate is not removed.

The prototype of the thermal control technology is a new small pump, the size of a pinkie finger, which, besides the cooling function is designed to withstand extreme loads such as launching a rocket taking off and rushes into the space. The pump will be shown in June on a mission rocket designed to carry microsatellites into space. “If the device to survive the vibration, the technology has reached a milestone in its development,” said Didion. “That means it is at or near operational status, making it a viable technology for use in space flight instruments.”

While the device is called a prototype pump has no moving parts. According Didion, contrary to current technologies used today by cooling the developers of tools and components no EHD does not rely on mechanical pumps and other moving parts. Instead, they use electric fields to pump coolant through tiny channels within a cold plate heat. From there, the waste heat discharged on a radiator and dispersed away from heat sensitive circuits that must operate within certain temperature ranges.

The fact that there are no mechanical parts that required a new cooling system is lighter, uses less power (about 0.5 W) and, especially, can be scaled to different sizes, the greater the cold plates of electronic components micro-scale devices and lab-on-a-chip. If you want to see how it would work, except for a small pump tested the prototype rocket in June EHD cold plate is also used to test the international space station in 2013.

Meanwhile, Didion says, the team is working to keep growing EHD, such as the development of EHD pumps in the microchannels that are etched on silicon wafers. The next step is to put technology in the circuit, with the ultimate goal of the ladder to the chip level in the pipes does not exceed 100 microns, or about the width of a human hair.

There are no data available on technology costs to the amount, but hopefully in the future apply to the applications practical, like a computer chip. Then do not have to worry about finding a cooling water system or a big fan if you are big on overclocking.

When polarized sunglasses will help develop and increase the use of Velcro, this could be the next, the best thing – literally – that NASA had to offer.

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Windows Azure – Toolkits for iOS, Android and Windows Phone

Posted on 10 May 2011 by yizhan

Microsoft announced yesterday, a new toolkit for iOS, Android, and Windows Phone called the Windows Azure. The toolkit will allow developer to use the cloud to accelerate the creation of application on most mobile device platform.


image credits to

Images Credits to Microsoft


The toolkits aims the cloud to simplify the intricacy of supporting different devices. As a common Results, developers can now use cloud (internet) services to share common requirements like device notifications, authentication,and storage. At the same time, developers can maximize the performance of each mobile device by writing client code that exploits each platform. As more and more mobile applications rely on back-end services, the cloud can become increasingly useful and strategic for developers.

As Mentioned on my previous post on the Concept of Cloud Computing, The service is now in demand that lots of companies are embracing its service and features. Cloud computing is now considered as the next generation in computing service.


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Microwave Technology

Posted on 03 May 2011 by yizhan

Microwave detection and communications systems have come to play a major role in our technology today, but little appreciated, by most people.  Perhaps the application best known to the public is the microwave oven, but microwaves have also made possible live television from space and between continents. Microwave technology is also essential for safe all weather operation of commercial and military aircraft as well as for intercity telephone traffic. Before the 1970s the high cost of microwave systems tended to limit their use for mass-produced consumer products.  This situation changed with the introduction of comparatively inexpensive solid-state microwave sources suitable for such applications as counter-top ovens, collision-avoidance devices for automobiles, burglar alarms, and mobile telephones.

MICROWAVES, electronics radiation which is located in the spectrum between ultra-high frequency (UHF) television and the far infrared and which thus includes 100 million and 300,000 million hertz(cycle per second).  This range of frequencies corresponds to wavelength between 30 centimeter one millimeter;  hence the name “microwaves”, indicating wavelength that are short in comparison to commercial broadcasting wavelength of several hundred meters.

Microwave Applications

Radar.  Microwaves remained primarily a scientific curiosity until the advent of World War II and the ensuing demand for such new electronic weapon as radar.  Intensive development was then begun on microwave radar, although its principles had been demonstrated as early as 1923 by the U.S. Naval Research Laboratory.

Communications. Microwaves are widely employed in communications.  In addition to various military radio systems, there are numerous commercial microwave links in many parts of the world.  Since microwave don’t follow the structure of the earth ut instead travel in a straight line, the links are generally consist of repeater station that are mounted of highland or towers at about 48km (38miles) intervals.

Communication satellite. The system of relay tower required for microwave transmission can only be built on land.  If microwave are to be used in overseas communication, would be requiring another source of relay.  With this purpose, satellite was designed that could be place in space with the so-called stationary orbit and would act as a relay tower.

Heating.  Microwaves have use in heating in home and industries.  The energy generated by a powerful tube can be concentrated in a small area for very efficient heating in so – called radar range, which are clean, quite, and compact. They can cook food without heating the surrounding area.  These heating unit are also used in airplane galleys and bending machine.

The rapid progress of microwave technology since the 40′s is largely due to the invention of special tubes, such as the magnetron and klystron that is capable of generating large amount of microwave energy. 



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