User's Manual

Glossary
102 TuneUp Utilities 2006
Refresh rate
This indicates how many times per second the screen picture is recreated. The
higher this rate, the less the screen flickers. As the human eye perceives
relatively slowly, and due to a degree of ghosting, the constant recreation of the
screen picture is no longer perceptible above a certain rate, and is perceived as a
still image. Unlike televisions with their rapid movements and frequent scene
changes (where the flickering is not noticeable), computers most frequently
display still images and require a higher refresh rate. Many occupational safety
and standards agencies require a minimum refresh rate of at least 75 Hz to ensure
a flicker-free picture. In comparison, the refresh rate of a television is only 25
Hz. This value also depends on the sensitivity of the user’s eyes, with some
individuals perceiving no flicker at rates of 70 Hz, while others perceive
flickering at refresh rates up to 85 Hz.
The refresh rate for newer TFT/LCD monitors is normally 60 Hz, as the picture
on these types of monitors is permanently stable.
Registry
Also called the registry database. This is the name of the central Windows
database that contains information on all installed hardware and software.
Windows cannot function without the registry. It should be cleaned up regularly
so that it does not become too large and slow the system down.
Remote data transmission
A collective term for the exchange of data between two computers separated by a
greater distance, for example between an architect in New England and an
engineer in California. Data can be transmitted over the telephone network, over
the Internet or via FTP, among other options. In local networks (LANs), the term
used for this is simply data transmission.
Resolution (graphics card/monitor)
Resolution refers to the number of horizontal and vertical picture elements
(pixels) that make up a monitor image. In general, the higher the resolution, the
more detailed the appearance of the contents of the screen and the greater the
area on the screen (“screen real estate”). In principle, the resolution of a graphics
card depends on the amount of graphics memory, the refresh rate and the color
depth. The higher the resolution, the lower the refresh rate and color depth.
Graphics cards with 2 MB of memory can only display 256 colors at 1280 x
1024 pixels, while 16.7 million colors can be displayed at a resolution of 800 x
600.
Resources
The totality of all peripheral devices, memory and data that can be accessed from
a computer or over a network connection.