Touch screen technology is known to have been invented in 1965, however the extensive use of the technology began with the commercial growth of computer industry. With rising craze of touchscreen, market for touchscreen gadgets such as phones, laptops, tablets etc. has significantly grown in the last decade.

Touchscreen is like an invisible keyboard; so when you press a key, it completes an electrical circuit through which the current flows. The variation in current from different keys is detected by the processor to differentiate and understand different commands.

Normally, layered on the top of an electronic visual display of an information processing system, it is an input device through which the user can control information with the help of a stylus or by merely using their fingers.

How Do They Work?

There are different kinds of screens, each of which works in a different way. Let us discuss them in detail:

• Resistive Screen – One of the most popular technology at the time, resistive touchscreens comprise of a normal glass panel covered with a conductive and a resistive layer. The layers are kept apart by spacers along with a scratch resistant layer placed on top. The upper layer comprises of polyester plastic which is bonded to a rigid lower glass layer. When a user touches the screen, the two layers make a contact in that exact spot. An electrical current runs between the two layers and as the polyester layer touches the glass, it completes the circuit like any other key on the keyboard. A chip is placed inside the screen which detects the coordinates of the point of contact between the layers and translates it into signals that are used by the device to understand and translate the command.

• Capacitive Screen – The screen constitutes multiple layers of glass. Both inner and outer layer conduct electrical charge. Thus, the screens behave like two electrical conductors separated by an insulator or capacitor. When the user touches the screen with his finger, , the electrical field of the outer layer is altered and the alteration point is detected by sensors placed on the four corners of the screen. The alteration point acts as One distinctive feature of capacitive screens is that they can be touched in more than one place at once.

• Infrared Screen – An infrared touch screen is characterized by a grid pattern of LEDs and light detector photo cells arranged on opposite sides of the screen. The LEDs shine infrared light in front of screen and specific beams are interrupted when you touch the screen at a certain point. This helps the sensors in detecting the exact location of the touch.

For more information about gadgets and devices, contact Centex Technologies at (972) 375 - 9654.

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Deep web comprises of uncatalogued sub-pages of domains, encrypted networks, password-protected data, private databases etc. The content in this invisible web cannot be indexed by the search engines and so it is generally hard to keep a track of it. Although there is no accurate estimate, but deep web is considered to be 400 to 500 times bigger than the surface web which is a part of World Wide Web that is available to general public and can be indexed by search engines.

Web, in general, can be compared to an iceberg where surface web resembles the visible tip and the huge part hidden below the surface forms the deep web.

What Can Be Found On The Deep Web?

A search engine, by crawling from one page to another, creates an index of pages that are linked to one another. However, the page that could not be linked to another page or could not be found by the spiders or crawlers of a search engine comes under the ambit of deep web. It could be an unpublished or unlisted blog post, file directory, picture and/or the content which the search engine cannot see.

You are most likely to find a record of following things on the deep web:

• Personal email accounts
• Social media accounts
• Online banking accounts
• Medical records
• Legal records
• Academic records
• Data stored on private databases

Who Uses The Deep Web?

• Journalists
• Police and military
• Whistleblowers
• Political protesters

Common Misconceptions About Deep Web?

• Deep web is illegal
• It can be accessed by experts only
• It cannot be searched at all
• It is the same as ‘dark web’
• It is smaller or equivalent to surface web in terms of size
• It is run by criminals

Difference Between Deep & Dark Web?

The terms often used interchangeably are however, quite different from each other. The former is the pool of information on the web that cannot be accessed by search engines, but can be retrieved if you have an address. Whereas, the information on dark web is kept secretive purposely. It is often linked to criminal & illegal activity.  

In the absence of deep web, it would have been difficult in maintaining privacy as in that scenario anybody could access your accounts by searching you on google. Since, this information is private so deep web helps in preventing it from being misused.

For more information on deep web, contact Centex Technologies at (972) 375 - 9654.