How Capacitive touch screen (Mobile) works

Electronic devices can use lots of different methods to detect a person's input on a touch screen. Most of them use sensors and circuitry to monitor changes in a particular state. Many, including the iPhone, monitor changes in electrical current. Others monitor changes in the reflection of waves. These can be sound waves or beams of near-infrared light. A few systems use transducers to measure changes in vibration caused when your finger hits the screen's surface or cameras to monitor changes in light and shadow.

The basic idea is pretty simple -- when you place your finger or a stylus on the screen, it changes the state that the device is monitoring. In screens that rely on sound or light waves, your finger physically blocks or reflects some of the waves. Capacitive touch screens use a layer of capacitive material to hold an electrical charge; touching the screen changes the amount of charge at a specific point of contact. In resistive screens, the pressure from your finger causes conductive and resistive layers of circuitry to touch each other, changing the circuits' resistance.

Most of the time, these systems are good at detecting the location of exactly one touch. If you try to touch the screen in several places at once, the results can be erratic. Some screens simply disregard all touches after the first one. Others can detect simultaneous touches, but their software can't calculate the location of each one accurately. There are several reasons for this, including the following:

• Many systems detect changes along an axis or in a specific direction instead of at each point on the screen.
• Some screens rely on system-wide averages to determine touch locations.
• Some systems take measurements by first establishing a baseline. When you touch the screen, you create a new baseline. Adding another touch causes the system to take a measurement using the wrong baseline as a starting point.

The Apple iPhone is different -- many of the elements of its multi-touch user interface require you to touch multiple points on the screen simultaneously. For example, you can zoom in to Web pages or pictures by placing your thumb and finger on the screen and spreading them apart. To zoom back out, you can pinch your thumb and finger together. The iPhone's touch screen is able to respond to both touch points and their movements simultaneously. We'll look at exactly how the iPhone does this in the next section.

Print

Cite

How to Download a Movie

 

 Downloading movies from the Internet has become a good option due to the growth of file sharing technologies and the availability of high-speed network connections. If you have a good Internet connection and some free space on your hard drive, you can easily learn how to download a movie even if you are a novice computer user.

• Address the necessary legal issues. In most jurisdictions, downloading a movie that you don't already own on another format (such as a DVD) will put you in violation of copyright laws. Films which are in the public domain will not be subject to this rule; they are free to use and not governed by any intellectual property laws. Be careful to address the legality of downloading a particular film before you begin.

• Download and install a BitTorrent client. While many other file sharing protocols exist, BitTorrent is the most effective and popular method for downloading feature-length films. To use this method, you need to install a piece of client software on your computer. Many of these applications are available for free; some of the most popular clients are Tixati, Vuze, Transmission, and uTorrent.

• Search for the movie on a BitTorrent search engine. After installing your torrent client software, you can download the torrent file for the movie in which you're interested. The best way to do this is to search for the film on a torrent search engine; 2 popular sites are Pirate Bay and Isohunt. You can also find torrent files using a regular search engine. A torrent file has a ".torrent" extension, and is actually just a text file telling your torrent client where to download the pieces of the movie.

• Load the torrent file into your BitTorrent software to begin the download. Double-click on the torrent file to load it into your torrent client. The download should begin automatically. Once the file has downloaded completely, leave the torrent software open for several hours to allow other users to download the file from you. This will improve your "torrent ratio," and will allow you to download additional files more quickly.

• Open the movie file in a media player application. Once the torrent has finished downloading, your client software will save the actual video file on your hard drive (check the settings in your torrent software to determine where the file is saved). Double-click the file to open it in your default media player. You can safely delete the torrent file itself once the video clip has finished downloading. 

Tips

• Torrents files with a large number of "seeders" (users who are sharing the whole file) will download the fastest.

• The website Archive.org maintains a large database of public domain films. If the film in which you're interested is public domain, consider checking for it on this site (or a similar site) first.

  

Do you know which websites refer the most visitors to your site? Google Analytics can provide the valuable answers to these questions, and many more. Here are few easy steps How to add Google Analytic to blogger:

1. Open a Gmail account if you don’t already have one.

2. Create a Google Analytics Account.

3. Click on: 'Add Website Profile.' Installing Google Analytics does not require knowledge of HTML, but there is a piece of HTML code that must be copied onto your blog.

4. In the box, enter your URL. (For example: www.facebook.com or Info--Mantra.blogspt.com.)

5. Set your Country and Time zone, and hit Continue.

6. Highlight the tracking code displayed in the large box and 'Copy'.

7. Sign into Blogger. Click on the 'Template' Tab, then click on 'Edit HTML'

8. Click on 'Download Full Template' to back up your template onto your computer. It's always a good idea to back up your template before you make any changes.

9. Scroll down to the bottom and paste the tracking code just before the closing 'body' tag. If you are using the Asynchronous code, the instructions may be to place the tracking code before the close of the 'head' tag.

10. Press 'Save Template' to save the changes.

11. Back in Google Analytics, click on 'Check Status' or 'Verify Tracking Code' under the Status column. Once your tracking code has been verified, the status will change to: 'Receiving Data.'