| Device
| Benefits (a)
| Disadvantages (b)
|
| Refrigerator
| In the longer lasting foodstuffs due to decreased biological action and, the constant availability of Ice and cold drinks.
| Heat is added to the kitchen area from the motor, the compressor and the heat of compression of the refrigerator. The refrigerator's unit will work a little harder to take care of this extra heat. This plus the cost of running the fridge, will increase power consumption which increases the Electric Bill. Also, she sound from the fridge and it's clicking in and out of operation.
|
| Microwave oven
| Microwave oven cooks many foods in about 1/4th of the time necessary on a gas burner. There is no wastage of energy.
It saves time in heating frozen foods. Thawing can be done in minutes or seconds.
Only the food is heated during cooking. The oven or the utensil does not get heated except under prolonged heating periods.
Flavor and texture do not change when reheated in a microwave oven.
Loss of nutrients is minimized. (3-carotene and vitamin C are better retained by microwave cooking compared to pressure cooking and saucepan cooking.
After cooking in a microwave oven washing dishes is much easier as food does not stick to the sides of the vessels.
Food gets cooked uniformly.
Preserves the natural color of vegetables and fruits.
No fat or low fat cooking can be made.
| Due to short period of cooking, food does not become brown unless the microwave has a browning unit.
It is not possible to make chapati or tandoori roti in it. It cannot cook soft or hard boiled eggs. Deep frying necessary for puris, jalebis, pakoda, vadas cannot be done in it.
Sometimes unwanted chemicals migrate to food from plastic cookware or food packages. Only "microwave safe" should be used.
The short cooking time may not give a chance of blending of flavours as in conventional methods.
The operator should be careful in operating the microwave oven since any exposure to microwave oven causes physiological abnormalities.
If the food is greater than 80 mm the central portion is out of range of the microwave radiation will only heat by the normal slow process of conduction. It will be relatively uncooked while the exterior accessible to microwave is cooked in minutes or seconds.
|
| Radio
TV-set
| A universal medium. Can be enjoyed at home, at work, and while driving. Most people listen to the radio at one time or another during the day.
Permits you to target your advertising dollars to the market most likely to respond to your offer.
Permits you to create a personality for your business using only sounds and voices.
Free creative help is usually available.
Rates can generally be negotiated.
Least inflated medium. During the past ten years, radio rates have gone up less than other media.
Television is without doubt the most effective medium to deliver information to large numbers of people very quickly. News in one part of the world can be seen within minutes or even seconds in any other part of the world.
The variety of channels available offers a way to get several different views of events. Having a single editor's opinion forced upon us is unlikely in most parts of the world.
Information is available to far more people with the use of television. People are able to gather information on politics, science, history, geography, culture in a way that has never before been possible.
Television can educate and inform independently of government in most parts of the world. Such information can help to protect people from would be dictators or oppressive regimes. Television was a factor in bringing together the protesters that brought down the governments of East Germany, Poland and the Soviet Union in the late twentieth century.
Television is a source of entertainment that is affordable. Before television, visual entertainment meant a trip to the theater to watch a movie or play. Today, movies, drama, comedy and music are all delivered straight to the home.
Used carefully, television can be a great children's educator.
| A universal medium. Can be enjoyed at home, at work, and while driving. Most people listen to the radio at one time or another during the day.
Permits you to target your advertising dollars to the market most likely to respond to your offer.
Permits you to create a personality for your business using only sounds and voices.
Free creative help is usually available.
Rates can generally be negotiated.
Least inflated medium. During the past ten years, radio rates have gone up less than other media.
Children can be exposed to programming that is not appropriate for their age. Adult themes of sex and violence are far too easily accessed and they destroy the innocence of children.
Adults frequently spend many hours each day watching television to the detriment of work or family life.
Television is often the main or only source of information about current events and biased or inadequate reporting can deliver inaccurate or misleading information and opinion.
Some of the companies use it for sex TV films and programs, and that of course case a lot of social problems.
Family discussion and conversation can be reduced or eliminated with by the television being the focus of attention.
Because of violent news, such as killings and bombings, we may develop an inflated sense of danger
The more that television is watched, the less exercise people tend to get. Television is often blamed for the rise in obesity in the Western world.
Content that contains sex or violence can cause a belief that such behavior is normal and acceptable. Trash programs that promote idiotic-- "The Simple Life" is also an example of questionable behavior being presented as acceptable.
|
| Mobile phone
Computer
| You can carry a mobile phone with you so you don't miss important calls.
If you are lost, you can call for directions.
If you are in an accident, you can call the police or ambulance - and if the phone has a camera, you can take pictures of the accident.
You can listen to music, text and play games when you're bored.
Most mobile phones have a calculator and a phone book.
You can use a mobile phone to call your customers or boss if you are running late to a meeting.
You can surf Internet & Connect with the whole world by Mobile.
You can chat & video conference.
Keep in touch with friends and family.
Good for emergencies.
Employees can keep in touch at all times.
Customers can contact staff 24/7.
Phones have internet connection.
More work available. They have cameras.
You can check your emails.
Can be used worldwide.
It can fit in your pocket.
· Increases speed of computing and processing information in any other way.
· People can use sophisticated statistical and mathematical tools for decision making and further purposes without learning in details the algorithms used for computing. This way people can use much more sophisticated analytical tools that would have been possible with only manual information processing.
· Computers can store large volumes of information without occupying too much space, as is in the case of information stored in form of books and paper documents.
· Computer processing eliminates the human errors of computing and information processing.
· Information once entered in computer system can be easily accessed by the same person or other persons at different times for different persons. This reduces the work load of capturing same information multiple times for different purposes. It also makes it possible for different person to work with same information, avoiding the possibility of different persons using different versions of the same information.
· The work of entering and editing information is made mush more easy and simple by software that offers many powerful user friendly features for performing these tasks.
· Computer now offer sophisticated and powerful software for representing information in rich formats with visual and video facilities.
· Computers combined with communication technology offer very fast speed and rich communication facility at low cost.
Computers, with all these features are now used for automating all kinds of equipment and processes.
| They can damage your ear.
Sometimes the reception is poor in some areas, limiting your connectivity (you can't talk underground or on planes).
People use the phone while they are driving, and this can cause problems.
They can limit your face to face time with friends and family.
They can get you in trouble at school.
Can be hard to find the right package.
Can ruin the connection to the computer.
Staff can abuse their phones if they have internet connection.
Can be hard for older people to use.
Because of their smaller size, they can be easy to lose.
The cost of computer and associated equipments is falling steadily. Still these equipments are and continue to be much more costly as compared to manual processing equipments like pen and pencil. Also technological complexity of these equipment makes it more difficult to learn and maintain these equipments as compared to equipments of manual information processing.
Use of computers require additional infrastructure, such as power supply and software back up. This increases the chances of problems due to failure of infrastructure. For example, a computer will not work where there is no electric power supply. Even a laptop with a battery will work without power supply only for a limited period.
Failures of computer system can be more serious and difficult to correct. For example, one scratch on a hard disk can make the complete data on the disk inaccessible. In comparison, manual system faults have comparatively limited impact. One page torn from a cabinet full of documents has no impact on other documents.
Computers generally reduce the errors of processing. However if there is an error in input data, it can result in major blunders in the processing which the computer system is unable to detect. In manual systems the chances of such blunders passing undetected and corrected is much less.
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