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Advanced principles of Human computer interaction - Assignment Example

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The front of the iPod is completely flat and smooth and the color can vary according to user preferences. Just below half of the front is taken up with the transparent screen through which you view the display for the interface. …
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Advanced principles of Human computer interaction
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Download file to see previous pages This matte area is marginally raised from the surface for a functional reason. On the matte area, on the four points of the compass are four playback buttons. At the north point is a "MENU" button that allows you to navigate through the menus. At the west point is a step back button. At the south point is a play / pause button. At the east point is a step forward button.The MENU button takes you from the normal screen to a menu screen that allows you to navigate to different capabilities including "Music", "Photos" and "Videos" options on the menu. You can then enter each of these menus and navigate through them and if you want to go back up to the previous level of the menu then you can just press the MENU button again. This allows you to move back through the menu systems if you have made a mistake during your navigation. Each time that you press it will take you to the next level up in the menu system until you reappear at the original screen that you started from.

The step back button allows you to go back to the beginning of the playback of an item should you wish to. It allows you to return to the start of a song or a movie if you should need to do that. If you press the button twice then you will return to the start of the previous item and each time that press the button after that you will be moved to the item before that until you reach the start of the play list. The step forward works in reverse since clicking on it will take you one item further on for every click of the button until the end of the play list

The play / pause button determines the playback of items depending on the amount of times you press the button. If you press it once then the item will play and if you press it twice then the track or video will freeze in place and continue from that spot when the button is pressed again. There are some actions that can be performed to the iPod that can cause it to automatically halt the playback of an item, such as removing the headphones from their jack, but the playback can be resumed by pressing the button.

The circular matte area itself also serves a purpose with regards to playback and navigation while the smaller circle within in it has navigation functionality. The larger circular area is used to control the volume of the items being listened to or watched. This control is exercise by running your finger or thumb in a circular motion over the area. The interior button is used to confirm a choice being made when it is depressed.

If you wish to increase the volume of the sound then you should move you finger or thumb in a clockwise circular motion over the area, while if you wish to decrease the volume then you would move your finger in an anti-clockwise motion on the area. In terms of navigation if you wish to navigate towards the bottom of the screen then you should move your finger in a clockwise direction on the surface, if you wish to move towards the top then you should move your finger in an anti clockwise direction on the surface.

Top and Bottom

On the top of the iPod is a slider that is used to lock the "key pad" of the iPod so that while it is been transported around random buttons cannot be pushed and damage the appliance. The slider prevents the pressing of buttons from ...Download file to see next pagesRead More
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