mouse computer

Posted on 4th February 2012 in Computer

The computer mouse is a common pointing device, popularized by its inclusion as standard equipment with the Apple Macintosh. With the rise in popularity of graphical user interfaces in MS-DOS; UNIX, and OS/2, use of mice is growing throughout the personal computer and workstation worlds. The basic features of a mouse are a casing with a flat bottom, designed to be gripped by one hand; one or more buttons on the top; a multidirectional detection device (usually a ball) on the bottom; and a cable connecting the mouse to the computer. By moving the mouse on a surface (such as a desk), the user controls an on-screen cursor. A mouse is a relative pointing device because there are no defined limits to the mouse’s movement and because its placement on a surface does not map directly to a specific screen location. To select items or choose commands on the screen, the user presses one of the mouse’s buttons, producing a “mouse click.”

 

The computer mouse is a common pointing device, popularized by its inclusion as standard equipment with the Apple Macintosh.  Read more...

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Finding The Best Computers For Sale

Posted on 1st February 2012 in Computer

Article by Morgan Hamilton

Have you bought your personal computer already? And just don’t tell me you have a Tandy 1000! I am sure you have hurled it in an empty room. I am talking about a real up-to-date computer. Is it a computer with all Internet access capabilities? Is it one, which is the latest array of technology! Maybe I’m going too far with this computer stuff. I just want you to be sure that you have the proper PC or Mac.

In order to witness the latest achievements of technology you’d better upgrade your computer. Otherwise, you should be acquainted with the wide variety of computers for sale. The computer is such a complicated machine that if fact there is no limit to what is available for sale. Computers can perform many complicated tasks nowadays. Do you want to burn a CD? Do not worry at all! Do you want to have high-speed cable Internet access at home? You will surely have it! Up-to-date machines can satisfy all your whims. You just need to search for computers for sale. If you don’t have a proper computer, computers for sale are your only chance.

Now, we must make sure that you are aware of where to look for computers for sale. PCs shopping are not a difficult challenge. Computers for sale are available almost everywhere. I guess that there is even a PC shop on your street. May be one of the best places for shopping for PCs is Circuit City.Computers For Sale  Read more...

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Computer Science

Posted on 30th January 2012 in Computer

In 1958, Chaim Pekeris completed a landmark project in computer science. As a physicist at the Weizmann Institute of Technology in Israel, he become fascinated with the relatively new science of quantum mechanics and its potential to explain from first principles the behaviour of atoms.

There was a problem however. The equation developed by Schrodinger that could do the job was too complex for mere mortals to handle. Using it to determine the electronic energy levels of a even a lowly helium atom was seemingly impossible.

Chaim had an idea, however: why not exploit the incipient field of computer science to do the job.

Today, Christoph Koutschan and Doron Zeilberger analyse the work he carried out over several years and compare it to the approach that they would take to the problem today. It makes for interesting reading.

Chaim’s task was monumental.

He first had to persuade the Wiezmann Institute and a technical committee including Einstein and Von Neumann, to build a computer. Einstein proved hard to persuade but was eventually won over by Von Neumann.

WEIZAC, Israel’s first electronic computer was built between 1954 and 1954. According to Wikipedia, WEIZAC was an asynchronous computer operating on 40-bit words. Instructions consisted of 20-bits: an 8-bit instruction code and 12-bits for addressing. For a memory it had a magnetic drum that could store 1,024 words.

Today you’d get more processing power out of a washing machine.  Read more...

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Online Computer Stores in India

Posted on 24th January 2012 in Computer

Article by Mamta Papneja

Online shopping is an easy and comfortable way of shopping for a large range of products. With the passage of time, more and more people prefer to make purchases online through shopping sites and with the help of free classifieds. Recent statistics have shown that some of the most popular products sold online are computers. When searching for the right computer to buy, one can go to online computer stores. With the help of online computer store,one can compare computers of all the brands along with the price and specifications. One can find computer of popular brands like Acer,Dell,Compaq,Toshiba and many more easily through online computer store.

Online computer or mobile store india provides different products with different brands and provide reviews on those products that provide valuable insights about the product and are often very useful for the consumers. These reviews are useful for comparing different products listed on the site. Online computer stores help the consumers to decide which product one should buy by providing detailed information about the product.Online computer stores describe the products for sale with text, photos and multimedia files.

Online computer stores also allow the customers to offer feedback and complaints that is more likely to be taken into consideration. The best part about shopping for computers from online computer store is that one has a lot to choose from, compounded by the fact that looking for a particular product is made easier by the search interface.One can get a better bargain through online computer store. One will find all the latest and popular accessories including Storage devices, Printers, Headphones, Speakers, UPS, Web cams, and much more to enhance the computer in the best possible way considering the budget of the buyer.  Read more...

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Photonic Computing

Posted on 22nd January 2012 in Computer

Article by PetterMartine

In today’s scenario there is growing dependence on computing technology, the need for high performance computers has significantly increased. With the help of virtual product design and development, costs can be reduced hence looking for improved computing capabilities are desirable. Photonic computing includes the Photonic calculation of transformation and Photonic pattern matching. Emerging technologies also make the Photonic storage of data a reality. Photonic desktop computer is capable of processing data up to 1,00,000 times faster than current models. outsourced software development companies can gain a lot of efficiency by using Photonic computers.

Photonic computers use the transfer and manipulation of photons, which are pulses of light, as a means of transferring and performing calculations of data. For performing calculations, Photonic computers manipulate the flow of electrons through logic gates composed of transistors, which acts like switches – located in the computer’s Central Processing Unit. Photonic computers, like modern computers, works in a similar fashion in the sense that they both transfer and manipulate data in the form of bits, however, unlike traditional computers where bits are represented as electrons, Photonic computers represent bits in the form of photons. The Photonic computer uses only light to collect, retrieve, and process data. This makes it operate much faster than electronically based computers because information and processing occurs at the speed of light. Another key benefit of the Photonic computer is that less energy is used to power the system and it does not have the same interference problems that make it difficult for current chip manufacturers to make smaller transistors. This is because light energy does not interact with other photons. The processor itself is a laser inscribed piece of crystal made in the laboratory and the current system uses only a huge amount of RAM to store information. Although this system is complete, it is still very simple and not very useful.  Read more...

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Industrial Computers

Posted on 19th January 2012 in Computer

In this day and age you can’t afford to run an industry efficiently without a computer as it plays a vital part in most manufacturing facilities. You must decide on a computer that is designed and built for 24/7 (non-stop; 24 hours a day, 7 days a week) and that can cope with the harsh industrial environment. There are many common hazardous elements in the industries such as dust, liquids, high temperature and so on that computers struggle to deal with. Dust often contains metals or other conductive materials that can accumulate in computer’s electrical system and cause short circuits. Dust can accumulate on the heat sink to prevent heat transfer rate, dust can block tiny ventilators to disrupt airflow and make the system overheating. Overheating is one of the common causes that shorten the lifespan of the CPU. Water can have more damaging effect if it penetrates the computer’s electrical system; an immediate short circuit can make the computer in-operable and force you to invest some more fortune.

 

Industrial computers are designed and built to withstand these harsh conditions.

They are more robust and solid to resist severe consequences; they can operate in ambient temperature as high as 45°C (115°F) and provided with additional cooling system. They are housed in an enclosure to make them free from reaching any dust particles, liquids or any other hazardous materials. Due to the fact that they serve varied purposes and are more functions than computers used for home and simple offices, they are designed for 24/7 use.  They come with higher grade power supply and in some cases an additional PSU is required.  Read more...

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