Friday, April 19, 2013

Finding information 2

In the past, we would often rely on printed or broadcast material being carefullly prepared and reviwed before it was published. Now, we should be more careful and suspicious because we know that information online may be blased or have some 'spin' to persuade us of someone's point of view.
There are a few things that give some indication of how reliable online information is, for example, by looking at the domain name. But in the end, you have to be carful and exercise judgement.
Don't forget that there are other sources of information still available, for example... 
  • the printed word
  • DVDs
  • CDs
  • images
  • maps
  • conversations 
  • radio and television

Finding information

Nowadays, it's easy to find information about practically anything on the Internet. If you go to aby search engine, you will be able to find something about what you want.
But, the internet is not necessarily always the best place to look. There are advantages and disadvantages to find information on the internet.

ADVANTAGES:
  • It may be very up-to-date.
  • It may come from the best experts in their field.
  • It may be in multi-media format and easy to understand.
  • There are lots of alternative sources such as websites, blogs, microblogs, wikis, podcasts, discussion boards and social networking sites.
  • You can discuss information with others.
DISADVANTAGES:
  • It may be old information.
  • Anyone can put information online so it may be unreliable.
  • It may be badly presented.
  • A blog is often just a set of opinions.
  • A discussion may or may not be useful to you.

Wednesday, April 17, 2013

Information tool

Input data                               

Process data                          

Output information                    

Data tool

DATA                                    WHAT IT MIGHT MEAN 
yes no no yes                  Wheter to admit each person to the night club.
  


Music to your ears


            A tin of beans

23 - 34 - 45                           A bank sort code

1101000011100000                 A computer instruction SHL AL1

Here, you have another website about databases.
http://it4esodatabases.blogspot.com/