[HCI] Total Website

How many websites exist? How big is the World Wide Web?
From searching with http://www.google.com/ , that show there are about 25,760,000,000 website in world wide web.

Patama Ramchune

49270621 CPE 3C

[HCI] Errors and Mental Models: Type of Errors

Slip

I think, one of the most error from user is type of error writing. Common user mistakes have been classified into seven types of error.

1) Accidental slips
The user may have deleted some words and may have forgotten to complete the sentence. For example, the absence of a fullstop at the end of the sentence, absence of some space between words, redundant commas etc. are ignored.

2) Spelling mistakes
A spelling mistake occurs when the user has typed the expected work so that one letter is redundant or missing or two neighbouring letters have been interchanged. For example, the user has typed "here" instead of "hear".

3) Article mistakes
For example, the user may have used "a" instead of "an" or "the".

4) Conversion mistakes
For example, the user may have not converted the active verb "break" to the past pariciple "broken".

5) Irregular verb mistakes
The user may have used the usual endding "-ed" to create the past participle of an irregular verb. For example, the user may have typed "stoped" instead of "stopped".

6) Noun mistakes
For example the user may have typed "duck" instead of "ducks".

7) Verb tense mistakes
For example the user may have typed "been" instead of "being".

For example if a user is given the sentence : "Alice brought flower" and the passive voice would be "Flowers were brought by Alice". However, if the user writes the sentence " Flowers were brought Alice",that mean "by" is missing.

Patama Ramchune
49270621 CPE 3C

ref.
Human-computer Interaction: Ergonomics and User Interfaces
By Hans-Jörg Bullinger, Jurgen Ziegler
Published 1999, page 659-660

CPE 495 first blog

CPE 495

Now I'm on trip at USA. When I come back to Thailand, I will update my blog as soon as possible

Patama Ramchune
49270621