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Thanya's Notes

Audio Embed

posted Jun 27, 2010, 4:36 PM by Unknown user   [ updated Jun 27, 2010, 4:37 PM ]

Not exactly Notes ;)

posted May 5, 2010, 12:28 AM by Unknown user   [ updated May 5, 2010, 1:15 AM ]

I was again procrastinating by looking through the WooRandomFiles Site, and here are some interesting and TERRIFYING things, I've discovered.
 
  1. Mr. Woo looks very awesome in high school, when he first made this sight, in the second post in the "News" Section, he was trialing different media types. The cool Mr. Woo can be viewed here: http://picasaweb.google.com/eddddie/HighSchool?feat=flashslideshow#5058246591132201410 The one thing I have to say is, Mr. Woo spent alot of time in Maths taking photos x)
  2. This course is not going to be as relaxing and cool as last term! From reading Mr. Woo's last HSC class's stuff, it looks like crazy stuff is coming at us. AHHHHH, I'm kinda veyr freaked out.
  3. There's so much stuff uploaded onto this site, so manudocuments and stuff. However, the site hasn't become "full" yet like Chandra's did last year. I wonder why....
Note to Self: Enjoy Prelim Year, Make Chap. 3 Science Notes, Be Nerdy, Be Cool, do Maths Past Papers, Get a Life.
 
EDIT: Ruse looked a lot lot lot different back then! My favourite photos are the ones of Ruse, it's kinda cool to think we had a semi-valley-ish oval thingo, and a LOOTTT of grasss, cooooooool, right? I guess T block not existing would give Ruse a lot more space x)  They also had really good daffodils for daffodil day. The ones we get nowadays are crappy :( GLOBAL WARMING, i think?... The ones "back in Mr. Woo's time" are like PRETTY!  Lol, one thing about Ruse that hasn't changed is the hall in exam time :L Same chairs, same table, same clocks that you wish would go slower x)
 

25/03 ~ Hyper text mark-up language

posted Mar 24, 2010, 2:12 PM by Unknown user   [ updated Apr 28, 2010, 1:04 PM ]

HTML is text interpreted by software and displayed according to the meaning of various tags.
 
GREEN IS AWESOME x)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

15/03 ~ Audio Data Type

posted Mar 14, 2010, 3:56 PM by Unknown user

  1. Sampling -
    • Sound is recorded at precise and regular time intervals
    • Each recording is called a sample
    • Each sample is stored seperately, just like a pixel
Factors affecting file size of a sound
  • How many samples per second
  • Bitrate -  how bits are assigned per sample
  • How many channels are there - ;Mono - one, Stereo - Two, Surround- six (usually)
Examples:
CD
- Sampling rate: 44 100 hertz
- Bitrate: 16 bit sound - 2^16
- Channels: Stereo
- Viva la Vida: 4:23 minutes - 263 seconds
 
  1. MIDI -
    • When a computer stores info about notes - stores pitch, duration, location, volume, instrument,
    • What is it?
    • Hwat kind of sounds can it represent
Project WEork
 

12/03 ~ Image Data Type

posted Mar 11, 2010, 3:37 PM by Unknown user   [ updated Mar 13, 2010, 10:16 PM ]

There are two main methods for storing image data (eg phtotgraphs,grapphics in a website, screenshots)
  1. Bitmap - in a bitmap each inidividual dot is storerd seperately. These inidividual dots are called picture elements or pixels for short. The file size of a bitmap depends on two things
    • the number of pixels
    • the number of colours

      When the number of colours is reduced on a bitmap, an effect is observed called banding.
  2. Vector - rather than storing pixels (individual dots), a vector image mathematically represents the shapes and colours in an image. Vector images are almost always vastly smaller than bitmap

08/03 ~ Displaying

posted Mar 7, 2010, 2:27 PM by Unknown user   [ updated Mar 7, 2010, 11:02 PM ]

Summary of Lesson:
Displaying is the process that outputs information for end-users in a form that non-participants can access.
... (Need to get from Lali's book, late)
 
 
Questions:
  1. List three information informartion systems you use daily, explaining how displaying is central to that systems' purpose.
  2. Can you think of any information system where displaying doesnt take place?
Answers:
  1. Three information systems I use daily are my:
    • Mobile - The main purpose of a mobile is to provide easy and independent communication that can be used basically anywhere (you need a signal thingy). Displaying is a very important and prominent part of a mobile. Displaying occurs in two ways; the audio from a ringtone, alarm etc. and the display or information on the screen. In this device, displaying alerts us of when someone is calling (sound) and who is calling (visual). If displaying did not occur, the phone would not work as effectively.
    • Laptop - The main difference between a laptop and a computer is that a laptop is (more) portable (which I'm sure you already knew x) There are many purposes of a computer  (since I didnt know the main one, I refered to wikianswers - x) - and here is what it said, I quote "With ever increasing availability of more complex and dynamic operating systems, the primary use of a computer is only limited to the imagination and technical know how of the user." - therefore implying that there are many, many purposes) HOWEVER, whatever the purpose, displaying is a major, major part of system's purpose, hence the reason we have a huge screen! and speakers and stuff. I'm not really sure how to explain this properly... so I'll get back to you on it =]
    • Ipod -  An Ipod's primary purpose is to provide a portable, compact device to carry around audio in. Displaying again occurs in the two forms of audio and visual - the screen lets you see stuff as you look through the Ipod. The audio displaying part of a Ipod is definetely more important than te visual as without an output of sound, it wouldn't serve its purpose. and and and, Ipod shuffles (the old ones) prove my statement (Y).
  2. I think it would be silly to have an information system that doesn't do the process of displaying, because for me as an end-user, it's probably the most important. Sadly, my brain isn't samrt enough to think of an information system that doesnt display at all. However, here are two information systems where displaying is not thaaaaaat big =]
    • An internet router - other than the little lights that run along the side which are actually quite important, displaying isnt very prominent in this system.
    • An USB - this has virtually no displaying, however my traitorous USB has failed me and a green light flashes when I first insert it into the computer and when I'm copying stuff onto it.
However, after discussing this over with Mr. Woo, I find that both systems that I have listed actually do do quite a bit of displaying. Firstly, the USB we decided, was really a part of the computer (like an add-on) it can exist on it's own but not in a form that we can use, the computer does the displaying for it. Think of it this way, the computer = human body and USB = eye. A body is a system, but within that system there are several oter systems i.e. the eye. The eye carries out functions on its own but need to the rest of the body for displaying and full use i.e. needs blood, signals from brain, movement of muscles etc. This is similar to the way a USB exists. Secondly, an internet routeran exist on its own, but its function is to send it output stuff to the computer so that we can access whatever it has to offer. Te computer again does the central displaying for it. Soooo, in conclusion, I have a really dumb brain that is incapable doing this question. x)  The End. Fini.
 
 

04/03 ~ Processing + Transmitting and Receiving

posted Mar 3, 2010, 9:47 PM by Unknown user

Summary x)
 
In Morning Class.. (and today I was EARLY by 10 minutes, personal record x)
PROCESSING
=> is the process that actually ALTERS the data.
=> There are two types of basic processing
  1. Updating
    e.g. changing roll class from 8L to 9K 
           antivirus software from old to new
  2. Editing and Manipulating
    e.g. a camera (see book) basically light enters camera, comes out as 'dots' (pixels) then is compressed (JPG) and stored into memory card.
METHODS OF PROCESSING
  • Centralised - happening in one place
                     - e.g. (CPU)
  • Parallel      - e.g.Google
                             WETA Digital special effect creator
                     - missing defintion
  • Distributed  - e.g. SETI@home 
                              folding@ home
                     - missing defintion
 
In Period 8...
TRANSMITTING and RECEIVING:
When data flows from a/n:
  • Non Information System to an Information System   ~ collecting
  • Information System to an Information System          ~ transmitting
  • Information System on a Non-Information System    ~ displaying
 
Four Important Features (?)
  1. Direction
    • duplex - two directions
    • simplex - one direction
  2. Protocol
    • an agreed upon set of rules
    • e.g. language - a common way of communicating (body language)
  3. Errors
    • detection - is actually quite hard
    • correction
  4. Security
    • more so "processing"

 

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