Un Interruptible Power Supply

Un Interruptible Power Supply or simply UPS, are now the essential part of the daily life in the countries where Power Failure is very common. In the beginning the UPS were very expensive so they were used only with the very expensive equipment which requires continuous supply of power. As the UPS became cheaper its usage expanded and they became an essential piece of equipment for Data Centers and Business Computers UPS are also being used now with Personal Computers, Entertainment systems etc etc.

The size of UPS depends upon its capacity ,the capacity can be from 200 VA to many Hundered VA. Normally UPS are used with Dry Batteries but it depends on the user .Dry Batteries are used in it as they are maintenance free and no harmful fumes comes out of it. When wet batteries are used with UPS ,it must be understood that these wet batteries require maintenance and these are harmful for the health of humans when they are placed inside the room due to their harmful fumes.
By type they can be Off Line ,On Line and Line Interactive.Off Line UPS are normally cheap in price.

Computer Hard Discs

The storage of the data is a very critical task. Different medias are used for the storage of data like Floppy discs,Hard discs,Writable CDs, Writeable DVDS,Tape Drives ,DAT Drives etc. Hard discs or Hard Disc Drives or simply HDD were introduced in IBM Machines in 1956.

Now a Days HDD are also used in Digital Video Recorders , Digital Audio Players and ,Digital Cameras .It was 2005 when SAMSUNG AND Nokia used Hard Discs in Mobile Phones . To secure Data on Networks NAS (Network Attached Storage ) and SAN ( Storage Area Network ) Hard discs are used.

When you talk about form factor of HDD ,it means the size of the hard disc ,there are many sizes like in 1979 the size was 8 Inches ,then in 1980 Seagate introduced 5.25 Inches HDDs .In 1984 3.5 Inch Hard Drive was introduced . 2.5 Inch HDD was introduced by PrairieTek in 1988. Then for Digital Audio Players 1.8 Inch Hard Disc was introduced . Now a Days the smallest form factor is 0.85 Inch used for Mobile Phones.

Media

Media has different styles, one may say,like Media can be Print Media or Electronic Media etc etc. Computers also played a very important role in the Media as in early ages it was very difficult for the publisher to print any News and Information that was required to be distributed among people .

The editing was not an easy job if you compare it to todays print media.Printable material is very easy to edit now a days and all the printing is obtained in a specific font size that is required.

that all is due to the advancement in the field of electronic media.

This electronic media played an important role when Radio and TV stations started there comunications for the public.Then a step was taken forwad when the Satellite were sent into the space.

Then it was the time when stalite tramissions were started.On satellite many types of programs were available for the people,these were News and Entertainment programs.

Games and Children

Many Children love to play video games. Home video games are extremely popular now a days. Many of American homes have computerized game systems connected to the television. With hundreds of selections available, video games are currently the most popular toy in America Every day the number of 6- to 16-year-olds playing video games increases.
These games have some advantages and some disadvantages .

Advantages may include
A Child become familiar with Computer based games,
He may have better coordination between eye and hand.
His intelligence may increase.

But there are some disadvantages also that are
- Children may become violent.

- exposure to explicit language

-high level of usage can cause trauma to developing bones and muscles (repetitive actions)

- Bad effect on eyes while sitting in front of a TV screen or monitor over a long period of time

- many parents are unaware of what their children are playing.

- Children don’t care about family activities.

- it can cause addiction .

- it can distract children from more productive activities.

LCDs &CRTs

In the beginning people were useing CRT Monitors that at that time comes with Black&white ,Green or amber display.Then Color Monitors,EGA Color Monitor,and the VGA Clor Monitors came.Then LCDs were being introduced.One may ask why should he buy a LCD not the CRT Monitor where CRTs are cheap as compared with LCDs .Well we have the answer for this ,one may buy LCDs because,

Brightness
The LCD monitor has a better brightness ,since an LCD acts like a shutter, it can be made brighter by increasing the brightness of the backlight. However, when the beam current of a CRT is increased to boost brightness, the beam spot size also increases, which lowers effective resolution and may yield a soft or fuzzy image.No flickerThere is no flicker on an LCD display because, while a CRT must be refreshed, the LCD has a constant source of light over the whole screen. Once a pixel is on, it stays on until turned off.
Focus
In contrast, an LCD has millions of pixels, each one effectively independent from its neighbor, with no scanning electron beam, so distortion problems are negligible. The image is always perfectly "focused" over the entire screen.
Power consumption
LCD consumes less power as compared with CRTs that is about one-third of that required for a CRT with the same screen area. In addition, the amount of heat generated by an LCD monitor is considerably less than a CRT monitor. And, if an LCD monitor is used with an uninterruptible power supply, the lower power required provides precious extra minutes to store critical data and shut down gracefully in the event of a power failure.These power-saving features of LCDs reduce the total cost of ownership.
Low emissions
An LCD is essentially emission-free, while a CRT monitor can generate electric, magnetic and even X-ray emissions due to the high-voltage power supply necessary to drive the CRT. An LCD causes no electromagnetic interference.

Computer and Frustration

Frustration is emotional response of a person when he fails to achieve the target .A computer user becomes frustrated when he/she is not able to get the maximum output from the computer .

Computer Technology is also creating frustration as this technology is now common in our lives. Because modern computing is marketed as user-friendly, it can be extremely frustrating when one cannot achieve a goal due in part to a software or hardware error, and because the user-friendly aspect is removed, many people find themselves unable to come to terms with their lack of options.

Manager are required to handle the frustrated person very carefully ,he must listen to the frustrated person with understanding to decrease his frustration level.

Appropriate behavior from the fellow workers , in turn, reduces the inner tensions that signal the motivated state. An understanding of the relationships among motives, behavior, and human goals provides the manager, administrator, or leader ,will help them minimize the behavioral problems

Computers in Space

NASA was founded in 1957 for the space activities,and at that time Computer was a huge machine full of valves . To take computers in space at that time was very funny and espacially if the space ship is without man as the service people were required to to cool down that Computers.

In 1976 viking used the 1802s in spce were built using Silicon-on-Sapphire which was much more stable in a radiation environment.

In 1981 the Space shuttle uses the APA-101S computer (5 of them for redundancy). They run at about 1.2MIPS and still use a couple megs of ferrite core memory (which is impervious to radiation). The entire control software for the shuttle is less then one meg. The new glass cockpit in the shuttle runs on Intel 80386s.

Now a days the RAD6000 is becoming very popular for space applications.

The versatility of the RAD6000 is demonstrated in the variety of past and current application configurations available,including packaging options,architecture variations,memory
configurations,and I/O selections.