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دنياي دانلود و آموزش - مقالات انگليسي

دنياي دانلود و آموزش

آموزش در مورد رایانه و کسب درآمد دانلود فیلم و بازی های روز

hard disk drive

 hard disk drive

An HDD in a nonremovable form of computer data storage. Measured in bits (and subsequently bytes, kilobytes, etc.), it uses magnetism and the binary system to store most of the things that makes your computer work, and your personal files.

 

It consists of at least one platter, which is a single disk that is rotated around a spindle and read by a head. The speed that the platter can be accessed with is measured in RPM, though a higher RPM is needed as the capacity of the HDD becomes greater.

 

After a set period of inactivity, the HDD spins down, which means the platters stop rotating to save energy. The drawback is the neccesity to spin back up when you use the HDD again, which takes a few seconds. When the HDD spins down, the head, which is attached to an arm moves from its reading position from over the platter to its resting position which is not over the platter. This is much safer for your HDD, because when you move your computer, or the HDD itself, the arm will not be shaken and damage part of the platter.

 

Most of the HDD is stored within an air-tight area. This is to prevent dust and any other small particles from entering the main area and ruining the (very sensitive) platters. If the HDD is cracked open, or forcibly opened, it is pretty much guaranteed that the HDD will not work next time that it is used.

  


ادامه مطلب
+ نوشته شده در  جمعه 1387/09/08ساعت 13:21  توسط majid  | 

USB Flash Drives

 

USB Flash Drives

A good few years ago now, I wrote the first Click article to focus on USB Flash Drives and in it I rather optimistically sounded the death knell of the floppy disc which at the time was still very popular. Of course, I also thought the end was in sight when we were introduced to the rewritable CD, the Zip Drive and the 120Mb Floppy, but let's not dwell on these points too much. The important thing to remember is that this time my prediction was accurate and this is down, in no small part ,to the remarkable success of the USB Flash Drive.


ادامه مطلب
+ نوشته شده در  جمعه 1387/09/08ساعت 13:13  توسط majid  | 

Computer Sound Cards

Computer Sound Cards

Computer sound cards are actually computer expansion cards that can input and output sound under control of specific computer programs. Typical uses of computer sound cards include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation/education, and entertainment (games). Many computers have built in sound capabilities, while others require these expansion cards if audio capability is desired.


ادامه مطلب
+ نوشته شده در  جمعه 1387/09/08ساعت 13:11  توسط majid  | 

Keyboard Shortcuts

Keyboard Shortcuts

For years I have been perplexed by the people that use their mouse for absolutely everything when are a number of perfectly good keyboard shortcuts that will do the job in a fraction of the time and I believe the reason people do this is that they just don't know there is another way. Why hunt around for an item on a menu bar if you can quickly hit a key and achieve the same effect?


ادامه مطلب
+ نوشته شده در  جمعه 1387/09/08ساعت 13:8  توسط majid  |