Before and After VGA

by bettyq3ps

In the earlier days of computers, the available monitors were either monochrome or two-color. This helped in the invention of IBM’s Color Graphics Adapter (CGA) in the year 1981 which provided a 4-bit palette of 8 colors and a maximum resolution of 640 x 280. Then, in 1984, an upgraded video card named as Enhanced Graphics Adapter (EGA) was developed in which the color palette was double having 16 colors and a resolution of 640 x 350. In 1987, IBM introduced Video Graphics Adapter (VGA) which led to the long lasting tradition.

Every modem graphics adapter card has the capability of displaying the VGA mode. This can happen only if the required device driver is not located or present, if it has been disabled purposely or if the operating system is not able to find a better driver. In the Windows operating systems, VGA can be displayed while booting the system in Safe mode.

VGA was replaced with Extended Graphics Adapter (XGA) in 1990 by IBM. But, during this time, the Video Electronics Standard Association (VESA) had released a similar device known as Super VGA (SVGA). Similarly, Super XGA (SXGA), Ultra XGA (UXGA) and Quad XGA (QXGA) were invented then onwards.

The display standards began to be developed faster from this point. The widescreen feature was developed with “W” in front of the display acronym like WXGA. So, the computer monitors started to be built with high resolution just like the video cards. Make sure that the highest standards of each device are compatible while you purchase VGA.

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Article Source: http://www.articlesbase.com/technology-articles/before-and-after-vga-1440524.html

4G WiMax Technology for Your Family's Needs

Oswald Melman

The fall is typically hectic time for most families as children start back at school and many of the sports teams, musical lessons, and extracurricular activities begin again. For working and professional parentsthis time of year can be particularly stressful, as it is necessary to juggle all of the responsibilities of work with the kids' increasingly demanding schedules. And as kids these days are joining more and more activities in preparation for college applications, it seems that the whirlwind of the school year is not due to subside anytime soon.

Luckily new advances in internet technology are affording one form of assistance to aid busy parents who must take care of all of the family's needs. 4G WiMax internet technology represents a new form of wireless internet access. With a subscription to a 4G WiMax internet service, you gain the unprecedented level of convenience that comes from staying connected everywhere you go, anytime of day. Gone are the days when you had to run home in between errands to check your email or scurry back to the office to finish up research for yourpresentation. With a reasonably priced monthly subscription you are essentially purchasing your own pass to high-speed wireless internet access anywhere in your city. This new service operates by giving you an aircard for your laptop, which will ensure that you can log on whether you are at the park, a local cafe, or the gym. It is essentially like a portable internet service.

A subscription to 4G is thus an ideal solution for the busy parent who must be everywhere at once. It gives you the freedom and flexibility of accessing your email and internet related work at Jimmy's soccer game, or Victoria's ballet lesson. No longer do you need to stress about meticulously planning your day down to the minute, or worry about choosing between supporting your kids at their activities and finishing tomorrow's presentation. Now you can attend all of the practices, recitals, and games that your kids have, and use the few minutes in between periods or acts to finish up some of your loose ends for your latest report.

A 4G WiMax subscription is also ideal for the whole family. Sometimes it can feel like pulling teeth to even get the kids away from the PlayStation or television long enough to convince them of the importance of finishing their homework, never mind completing it to the best of their ability. Yet a subscription to this new kind of technology allows you to give yourself and your kids the gift of the aircard's amazing flexibility. Now you can tell your kids they can study anywhere they feel inspired, so that they may choose to write their literature assignment under a beautiful oak in the local park, or finish their math assignment at the local coffee shop. Kids will undoubtedly be much more productive as they will be out of the home and away from its inherent distractions. They will also enjoy the freedom and pleasure of doing their work in their favorite places. Parents will enjoy the relief of knowing that their kids are happily and productively working on their scholastic assignments. With a subscription to 4G WiMax technology, busy parents can be assured that at least a part of the hectic fall schedule will be made much easier.

Bring your family on board with Clear internet. Get up to date with 4 G.

Article Source: http://www.articlesbase.com/communication-articles/4g-wimax-technology-for-your-familys-needs-1434684.html

Importance of Nano

by minniedolphlq

In computing industries nano means curses based text editor which is used in unix and unix-like systems. One ca n say that the nano which they are using is the clone of pico who was counted as the editor of the pine email client. Now nano in the market is taken as which emulates the operations nad easy accessingof interface of pico with no aid of strong mailer synchronization of pine and pico package. In the book of GNU that is general publiclicense nano is termed as free software. In the year 1999 chris allegretta discovered nano by using the tip. The intention of chris allegretta was to make such a free software which can replace pico. But under free software license none of them were distributed in the market. Later in the year2000 name was changed officially as nano to separate it from the tip command. This name belongs from si prefixes in which nano thought to be one thousand times larger than pico. As going through this journey of name nano in the year 2001 become official part of gnu project.

Now the nano is more preferrable among its users than pico as it has colored text, regular experession, search and replace option, smooth scrolling and many multiple buffers etc. Just like pico, nano has the keyboard orientation which is controlled by control keys such as control O helps in saving the current file, control W for search menu. On the keyboard nano keeps the shortcut bar just below the bottom showing lots of commands present in the current context. For toggling one behaviour nano uses meta keys in the c omputing system. Nano has the specific feature of using the mouse not only for activating the functions present on the shortcut bar but also positioning the cursor. Nano is widely used in many fields such as science and engineering, people, fiction and entertainment, and in many other uses.

Like in engineering nanotube means nanometre scale tube like structure, nanobe means small tiny filaments structures in rocks and sediments, nano used as a text editor etc. Then as people sourc e nano used as nano rubio who is a contemporary artist living in california, fatos nano who is a primeminister of albania, lourdes flores nano who is the leader of the national unity party of peru. In fiction and entertainment nano-nano pudding who is a charac ter of the anime galaxy angle II, nano also a brand fo virtual pets, ipod nano which is a media player marketed by apple inc., silver nano samsung product in the market etc . So in this way nano has vast usage in everydays life in each and ev ery field.

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Article Source: http://www.articlesbase.com/technology-articles/importance-of-nano-1431427.html

Solar Battery Chargers

by bettievargason

Solar Battery Chargers are environment friendly and easy to operate. They are also productive in relation to cost and do not harm the environment and reduce the electric bill as it requires only energy from the sun to recharge batteries. These chargers are very easy to carry and can be taken along anywhere. They are often used for recharging a variety of things including cell phones, AA or AAAbatteries, mp3 players, laptops, cameras, camcorders, GPSs, etc..

Solar Battery Chargers are available in different capacities depending upon the requirement. They are charged by placing the unit in direct sunlight for a given time, the time varies according to the type of battery. It provides a continuous flow of energy without any interruption. A solar battery charger is able to charge a number of batteries in order to store electricity and supply when required. The energy is store in daylight hours and later used even when there is no sunlight i.e., during the night.

The solar battery charger is one of the most useful and beneficial devices to come out of the development of solar technology. Our Earth receives plenty of solar energy coming through the sun which is wasted but by the use of solar chargers this energy is saved and used in the form of electricity later, thus preventing the use of harmful substances contained within batteries and protecting our environment by reusing batteries and getting maximum use from them. We all know about home solar systems, even here the solar battery chargers are used. Those who have home solar systems to provide their houses with energy also know about the benefits of batteries. Solar batteries are charged by the large panels on the roof of the home. These batteries supply the home with energy once the sun has gone down, they can be a source of backup power, hence providing a free supply of electricity.

Thus, there are various use of solar battery chargers and we are looking for more new and exciting variations in the use of this free renewable energy source. This would be a great leap for technological innovation. New technologies regarding how we use solar electricity in many different systems are extremely important for the future.

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Article Source: http://www.articlesbase.com/technology-articles/solar-battery-chargers-1428515.html

What is a Trojan Horse Virus?

by Matt Gray

Today, there are viruses and there are TrojanHorses. However, there is no such thing as a “Trojan virus”. Actually, the real definition of each prevents the chance of the virus’ being such a thing. Trojan doesn’t replicate but Viruses do. That truth alone implies there could never be a "Trojan Horse virus".

The description of Visa continues with this message, "A Trojan Virus is an e-mail virus commonly released by an e-mail attachment." Well, not so. A Trojancould be sent with the attached file in e-mail, but it is definitely not an e-mail virus. (Actually, there are some true e-mail viruses, but that is another whole topic). Therefore, it may or may not go with e-mail, and it is equally possible to have been downloaded from websites or resulted from P2P file transfer. Therefore, vectors have nothing to do with either something is or is not a Trojan.

What is a Trojan then?

This is a common yet hard to eliminate computer threat. It is a type of virus which attempts to make the computer user think that it’s a advantageous application.

Trojan works by hiding in a set of useful software applications. Once installed or executed in your system, the virus will begin infecting other files in your computer.

The virus is as well commonly capable of stealing important info from your computer. It will then transfer this info to Internetservers assigned by the virus’ developer. The developer can then be able to get control over your PC through this virus. While these stuffs occur, you may observe that your infected computer become very slow and sometimes unexpected windows simply pop-up without any command from you. Later on, this can result your computer to crash.

The Trojan could actually spread in many ways. The most usual way of infection is by means of e-mail attachments. The virus’ developer usually utilizes different spamming tactics to spread the virus to unsuspecting users.

The best way to prevent a Trojan Horse Virus from entering and infecting your computer is to never open email attachments or files that have been sent by unidentified senders. However, not all of the files we could receive are guaranteed to be virus-free. With this, a nice way of securing your computer against malicious programs like this harmful application is to install an antivirus software and updating it.

Protect your PCs from Trojan Horse Viruses by reading more about them and how you could prevent viruses from infecting your computers now!

Article Source: http://www.articlesbase.com/computers-articles/what-is-a-trojan-horse-virus-1420247.html