Tuesday, June 1, 2010
VIDEO :)
We are no more doing the dance tutrorial, Abuk will now be doing her assignment on her own and Julie and I are doing a computer tutorial, it will require us using a camcorder. We are looking for a free camcorder download, then we will make our tutorial on application on the computer such as how to use facebook or paint or other applications... :)
DATA COMPRESSION!!
What is data compression?
It is the process of encoding information using less bits than an unencoded.
What is a data compression ratio?
It is also known as compression power, data compression is a computer-science term used to quantify the reduction in data-representation size produced by a data compression alogirthm.
Why is data compression an important technique for the online world?
It is important because, it helps compress data so it can be downloaded or uploaded to anything or from anything.
What is the difference betweeen Lossy and Lossless data compression?
Lossless data compression uses data compression algorithms which allow the exact original data to be recreated from the compressed data, where as Lossy data retrieves data that may be different form the original one but it is still 'close enough' which is useful in some way.
Which method offers the greatest compression ratio?
Lossless because through that method, none of the information is lost it compresses the exact data.
Why is human psychology and perception an important factor in method of Lossy compression?
An important factor is that it allows us to get rid of data we dont notice. For example: certain high frequency of sounds.
Name Lossy file formats for audio, still image and video format.
There are heaps of formats, names of some are; Mp3, JPEG, Mpeg.
It is the process of encoding information using less bits than an unencoded.
What is a data compression ratio?
It is also known as compression power, data compression is a computer-science term used to quantify the reduction in data-representation size produced by a data compression alogirthm.
Why is data compression an important technique for the online world?
It is important because, it helps compress data so it can be downloaded or uploaded to anything or from anything.
What is the difference betweeen Lossy and Lossless data compression?
Lossless data compression uses data compression algorithms which allow the exact original data to be recreated from the compressed data, where as Lossy data retrieves data that may be different form the original one but it is still 'close enough' which is useful in some way.
Which method offers the greatest compression ratio?
Lossless because through that method, none of the information is lost it compresses the exact data.
Why is human psychology and perception an important factor in method of Lossy compression?
An important factor is that it allows us to get rid of data we dont notice. For example: certain high frequency of sounds.
Name Lossy file formats for audio, still image and video format.
There are heaps of formats, names of some are; Mp3, JPEG, Mpeg.
Friday, May 28, 2010
RSS Feed!!
Definition of RSS Feeds?
RSS stands for Really Simple Syndication. It is also called web feeds. It is a content delivery vehicle. RSS is the format used when you want to syndicate news and other web content. When the content is distributed it is called a feed.
What goes in the feed?
You can either have a partial feed or a full feed. A partial weeb wil include headlines, a short summary of the content and a link back to the place where the content resides. Through a partial web you can encourage your readers to click and the read the full article. But there is also the full feed which means that the whole article comes into their newsreader and they dont have to go back to the website at all to get you content.
What can a feed do for you?
It does different things for content recipient and for a website publisher/company. For the content recipient the internet provides us with an access to information at the touch of a keyboard. However it has an awesome amount of information. The get can get updated, and they make it east to keep this flow of information.
For a website published it keeps your audience updated constantly. Feed keeps you in communication with your audience. It is the ultimate content delivery vehicle. News is the perfect content for a feed. For ages 18-54 old age year group internet is the number 1 choice news. Journalists use the internet to reasearch stories. You can update your product news regularly. If the headlines are flashy, chances are they'll quickly open it and read it.
How are feeds different from e-mail?
It is different from e-mail because it is a much secure delivery method. It has a 100% delivery rate, whereas e-mail only has 34%. Emails have heaps of spams and RSS has no spam. You can unsubscribe with a click of a button.
How do people read feeds?
To reciceve a RSS feed you need a newsreaded or content aggregator. There are Web-based readers like Bloglines and My Yahoo. Newsreaders are downloadable and you can install them easily on your desktop, an example would be the PRESSfeed reader, an easy newsreader which can be downloaded easily. Others may include NewsGator, they are avaliable free and paid. Newsreaders have a variety of special features, like combining several related feeds in to a single view, hiding items that you have already seen and categorizing.
How do you find the feeds you want to subscribe to?
They get picked up and published by other websites. Feeds are gainign the attention of the other search engines. Most of the time it come up high in a keyword search and we dont even know we are reading feed content. Feed search engines and blog search engines are everywhere on the net. As people are finding out about feeds they now often look for the little oranfe and gray icons that illustrate that the content is avaliable in a feed. Icon usually says RSS oe XML or simply web feed.
RSS stands for Really Simple Syndication. It is also called web feeds. It is a content delivery vehicle. RSS is the format used when you want to syndicate news and other web content. When the content is distributed it is called a feed.
What goes in the feed?
You can either have a partial feed or a full feed. A partial weeb wil include headlines, a short summary of the content and a link back to the place where the content resides. Through a partial web you can encourage your readers to click and the read the full article. But there is also the full feed which means that the whole article comes into their newsreader and they dont have to go back to the website at all to get you content.
What can a feed do for you?
It does different things for content recipient and for a website publisher/company. For the content recipient the internet provides us with an access to information at the touch of a keyboard. However it has an awesome amount of information. The get can get updated, and they make it east to keep this flow of information.
For a website published it keeps your audience updated constantly. Feed keeps you in communication with your audience. It is the ultimate content delivery vehicle. News is the perfect content for a feed. For ages 18-54 old age year group internet is the number 1 choice news. Journalists use the internet to reasearch stories. You can update your product news regularly. If the headlines are flashy, chances are they'll quickly open it and read it.
How are feeds different from e-mail?
It is different from e-mail because it is a much secure delivery method. It has a 100% delivery rate, whereas e-mail only has 34%. Emails have heaps of spams and RSS has no spam. You can unsubscribe with a click of a button.
How do people read feeds?
To reciceve a RSS feed you need a newsreaded or content aggregator. There are Web-based readers like Bloglines and My Yahoo. Newsreaders are downloadable and you can install them easily on your desktop, an example would be the PRESSfeed reader, an easy newsreader which can be downloaded easily. Others may include NewsGator, they are avaliable free and paid. Newsreaders have a variety of special features, like combining several related feeds in to a single view, hiding items that you have already seen and categorizing.
How do you find the feeds you want to subscribe to?
They get picked up and published by other websites. Feeds are gainign the attention of the other search engines. Most of the time it come up high in a keyword search and we dont even know we are reading feed content. Feed search engines and blog search engines are everywhere on the net. As people are finding out about feeds they now often look for the little oranfe and gray icons that illustrate that the content is avaliable in a feed. Icon usually says RSS oe XML or simply web feed.
Monday, May 24, 2010
Broadband and Bandwidth!
What is broadband? Broadband Internet access, is usually just shortened to broadbad.
It is a high data rate internet access, typically contrasted with dial-up access using a 56k modem.
What units are used to measure bandwidth?
Bandwidth is usually measured in bits and bytes. A byte is 8 bits.
How much faster is broadband than dial up?
Broadband is atleast four times faster than a dial-up. But usually it is much much faster than dial-up.
What are the speeds that broadband operates at compared to dial up?
Broadband is often called 'high-speed' access to the interent, it is usually 256 kbits/s (0.256 Mbit/s) or even greater whereas dial-up only has a speed of 56 kbit/s.
What are some of the advantages of using a broadband connection to download something like a video compared to dial up?
Some advantages of using a broadband connection to downloading something is, it works up to 100 times faster than dial-up conenction. You can download things in seconds or minutes instead of hours. The internet connection is always on so it is not like the download will be interepted.
A] How many people subscribed to the internet in 2007? How many of these were for business use? How many for home use?
Around 7925 people subscribed to the internet in 2007 and 1295 were for business use and 6629 for home use.
B] Look at the access technoloogies heading. How many more people using broadband since 2005?
Out of the 4.7 million households around 48% had broadban internet access. This grew during the year and it almost doubled with 2.3 million households using broadband internet access.
Check internet speed:
1. What is the speed of the connection from your computer to the Sydney location on the map?
2. What is the speed of the connection from your computer to the U.S location on the map?
3. Why did the data transfer rates vary?
It is a high data rate internet access, typically contrasted with dial-up access using a 56k modem.
What units are used to measure bandwidth?
Bandwidth is usually measured in bits and bytes. A byte is 8 bits.
How much faster is broadband than dial up?
Broadband is atleast four times faster than a dial-up. But usually it is much much faster than dial-up.
What are the speeds that broadband operates at compared to dial up?
Broadband is often called 'high-speed' access to the interent, it is usually 256 kbits/s (0.256 Mbit/s) or even greater whereas dial-up only has a speed of 56 kbit/s.
What are some of the advantages of using a broadband connection to download something like a video compared to dial up?
Some advantages of using a broadband connection to downloading something is, it works up to 100 times faster than dial-up conenction. You can download things in seconds or minutes instead of hours. The internet connection is always on so it is not like the download will be interepted. Australian Bureau of Statistics:
A] How many people subscribed to the internet in 2007? How many of these were for business use? How many for home use?
Around 7925 people subscribed to the internet in 2007 and 1295 were for business use and 6629 for home use.
B] Look at the access technoloogies heading. How many more people using broadband since 2005?
Out of the 4.7 million households around 48% had broadban internet access. This grew during the year and it almost doubled with 2.3 million households using broadband internet access.
Check internet speed:
1. What is the speed of the connection from your computer to the Sydney location on the map?
The speed connection from our computer to the Sydney location is 0.30 Mb/s (upload).
2. What is the speed of the connection from your computer to the U.S location on the map?
The speed of the connection from our computer to U.S. location is 0.20Mb/s (upload).
3. Why did the data transfer rates vary?
It varies because it takes longer to go all the way to the U.S. whereas for Sydney, its in the same country.
Tuesday, May 18, 2010
ABUK, JULIE AND I!
Abuk,Julie and I are in one team. We are doing a dance tutorial, Abuk will be teaching the dance to Julie and i will be recording it.
Today we tried to see if it works out, Abuk taught Julie some dance steps on the song say ah...It was hard but Julie and Abuk still tried. It didnt work very well so we will have another next lesson.
:)
Today we tried to see if it works out, Abuk taught Julie some dance steps on the song say ah...It was hard but Julie and Abuk still tried. It didnt work very well so we will have another next lesson.
:)
Thursday, May 13, 2010
New Terms relating to audio files
Stereo: It is a system for reproducing stereophonic sound.
Channel: A path over which electrical signals can pass.
Track: A distinct selection of music from a recording or a compact disc.
Frequency: The number of times a particular type of music or sound occurs.
Hertz: The unit of frequency; one hertz has a periodic interval of one second.
Decibel: It is a logarithmic unit of measurement that expresses the magnitude of a physcial quantity to a specified reference level.
WAV: It is short for Waveform Audio File Format, WAV is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.
mp3: It is a common audio format for consumer audio storage,also a de facto standard of digital audio compression for the transfer and playback of music on digital audio players.
aiff: Short for Audio Interchange File Format, it is an audio filr format standard used for storing sound data on personal computers and other electronic audio devices.
Channel: A path over which electrical signals can pass.
Track: A distinct selection of music from a recording or a compact disc.
Frequency: The number of times a particular type of music or sound occurs.
Hertz: The unit of frequency; one hertz has a periodic interval of one second.
Decibel: It is a logarithmic unit of measurement that expresses the magnitude of a physcial quantity to a specified reference level.
WAV: It is short for Waveform Audio File Format, WAV is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.
mp3: It is a common audio format for consumer audio storage,also a de facto standard of digital audio compression for the transfer and playback of music on digital audio players.
aiff: Short for Audio Interchange File Format, it is an audio filr format standard used for storing sound data on personal computers and other electronic audio devices.
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