Uses of Computer Networks

Computer Networks are everywhere. From the distributed systems to the middle ware and to the world wide web, computer networking has proved to be improving in techniques to reach remote areas and applications to serve the purpose.

1. Business Applications: Resource sharing is one of the most popular use of computer networks in the business applications. For Instance, a printer is shared in a network and hence saves a lot of investment in hardware. The computers connected in a network can make use of the printer in the network instead of having separate printers for every computer. Scanners, Cd burners, Fax machines are few other resources which can be shared in a network. Email facility with the help of Outlook application has enabled communication among the members of the company in sending reports and analyzing data. There would be a server handling the requests of all the computers connected in the network. Clients pass the request and the server works on the request by giving the reply.
2. Home Networking: Computers are now a days used just for person to person communication with the help of Internet. Internet can be used to have remote access to the information, person - person communication as discussed earlier electronic commerce, Interactive entertainments like games. Interactive entertainments such as XBOX gaming online and online tutorials which used flash for interactive environment. Now a days, people are buying a computer just for the sake of checking their email which enables person to person contact. With the help of VPN ( Virtual Private Network) one can work and access of office data right from home. In peer -peer systems there is no client system. Every computer in a network is connected to every other computer through wire.
3. Mobile Users: With the advent of technology in improving protocols for better communication, WAP (Wireless Access Protocol is now being increasingly used to communicate in a network. There are two forms of wireless: Fixed Wireless and Mobile Wireless. Desktop computers in an office are neither fixed nor mobile wireless. A notebook computer used in a Hotel room with the help of Ethernet cable is an example of mobile wireless and not of fixed wireless. Networks in old unwired building is an example of typical fixed wireless and not of mobile wireless. Portable office or PDA for store inventory is a perfect example for fixed as well as mobile wireless technology being used. M-commerce is using mobile device for paying cash using credit cards and act as an electronic wallet.

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Uses of Computer Networks

Uses of Computer Networks

Information About Computer Monitors

Computer Monitor also known as computer display or visual display unit. It is a piece of any machine powered by electricity in which it displays images through a device called computer. This monitor consists of display device, circuitry and enclosure. The modern monitors use the display device as TFT-LCD (Thin Film Transistor-Liquid Crystal Display) and the olden monitors make use of CRT (Cathode Ray Tube). So, these are the two types of monitors.

The Computer Monitor uses many hardware technologies to display the output. They are,

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• Plasma display,
• Video projectors like CRT, LCD, and DLP etc.
• FED (Field Emission Display).
• Vector displays etc.

Information About Computer Monitors

The performance of the Computer Monitor can be measured using the parameters like luminance, aspect ratios, display resolution, dot pitch, response time, refresh rate and viewing angle. The various problems that take place in the monitor are dead pixels, stuck pixels, glare, incomplete spectrum etc.

The various features with the Computer Monitor are power saving, touch screen, glossy screen and integrated accessories. The major manufacturers are Acer, Apple Inc, Samsung, Sony, Dell, HP and even more. So, it shows pictures on the screen. It is an electronic device which is used to see the programs on a computer. This has a better resolution than the television and it does not have tuners to change the channels.

The screen size is based on the distance between two opposite screen corners. So, computer display modes are used to know the size of the monitor. The various interfaces are used to communicate with the computer. They are computer terminals, composite signal, digital monitors and TTL monitors. More than one monitor can be attached to the same device. This can be done in two ways and it includes,

• Mirroring or cloning,
• Extension.

CRT is the picture tube of the monitor. In this, the screen is coated with the phosphor dots and each dots termed as one pixel. The back of CRT is the negatively charged cathode. So, this is important to the monitor to display the images.

Information About Computer Monitors

Article written by Jeff Frasco. Visit Buycomputercomponents.com for information about computers. The website offers knowledge about where to buy computer parts and information to help you choose computer components.

Occupational Therapy - Infrared Heat Heals Computer Cold Mouse Hand Pain

Join the American Occupational Therapy Association's April 2009 celebration. Occupational Therapy Month month is right around the corner.

Occupational Therapy intervention is one of the most promising, results-oriented job-savers a person can experience within a lifetime. A healthy, healing intervention saves jobs, restores hope, a worker's self-confidence and self-esteem. This story is about the loss of hand movement, and the positive results of an OT intervention.

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Losing the function of a hand can be devastating, especially when the hand is needed to work at the computer all day. Finding a new job is not easy and almost impossible in today's economic situation. Rehabilitating an injury is a lot of work. Of the two choices, we choose rehabilitation. The alternative of not holding a job isn't an option.

Occupational Therapy - Infrared Heat Heals Computer Cold Mouse Hand Pain

The loss of the use of a person's computer mouse hand due to arthritis and poor circulation can make everyday computer tasks painful and dreadful. The pain from a sick computer mouse hand causes the hand to cramp, freeze and fingers become numb. Pills aren't always the solution and aren't an attractive idea. The only relief is not working, and it is not a suggested option.

Most occupational interventions rely upon ingenuity and creativity. For our computer mouse hand injury, we relied upon a mouse hand warmer blanket pouch to hold the computer mouse and mouse pad. The blanket is made of fleece and covers the computer user's hand completely creating a warm house for the mouse and mouse pad. We inserted inside the mouse hand warmer blanket pouch an USB heated mouse and USB heated mouse pad to generate heat inside the blanket pouch housing.

The USB heated devices are designed with a carbon fiber. Carbon fiber generates infrared heat. Infrared heat is healing. The sun is an example of the natural source of infrared heat. The Eastern Medical profession has been using the healing effects of infrared heat for thousands of centuries. The Western world is starting to catch on to the healing effects of infrared heat through infrared saunas and now occupational computer devices.

It is documented proof by therapists and physicians worldwide, 20-30 minutes per day of infrared heat has healing effects on an injury, in this case, of the hand. I conducted a 4 week study using a mouse hand warmer blanket, an infrared heated mouse and infrared heated mouse pad with a person who suffers with arthritis and poor circulation of the computer mouse hand. After three weeks of 30 minutes of daily use, the right hand is healed. There's no cold, cramp, pain or discomfort in the person's right mouse hand.

The use of the hand for computer related work is not going to fade or go away soon. As a matter of fact, the occupational related hand injuries will increase based on the continued widespread computer use activity. The first computer mouse turned 40 years old in 2008, and introducing the healing effects of infrared heated computer mouse and mouse pad is being made in 2009. We've come a long way, and we have a long road ahead.

Occupational Therapy - Infrared Heat Heals Computer Cold Mouse Hand Pain

For more information about the healing effects of infrared heated computer devices visit http://www.IGMproducts.com. To receive free samples of the products and to review the products for your OT needs, please visit IGMproducts.com and Contact Us.

Anna Miller
Mouse Hand Warmer
http://www.IGMproducts.com