Question

describe three common element such as security, GUI, hardware, camera and touch screen features of mobile computing devices.

Answer 1

Mobile Touchscreen: In recent times, we have seen a great transformation of mobile computing devices and components. Earlier Mobile phones used to have a separate dial-pad mounted below the screen but nowadays external dial pad have vanished completely and the functionality of the dial pad has been embedded as a software in the mobile's operating system. The mobile screens have become a touch screen that acts as an input device and sense the touch gestures and operate as per the instructions provided by the user. The touch screens are sensitive to stress; a user communicates with the mobile applications by touching pictures or words on the screen. The touchscreen set-up consists of a normal glass panel that is covered with conductive and resistive metallic layers. These two layers are held apart by spacers, and a scratch resistant layer is placed on top of the whole setup.

How does the Touch screen work?

• When the screen is touched by the user, the two layers make contact exactly at that spot.
• Due to the change in the electrical field, the coordinates of the point of contact are calculated by the processor.
• Then, a special driver translates the touch into something that the operating system can understand, much as a computer mouse driver translates the movements of a mouse into a click or a drag.
• The change in the electrical current is registered as a touch event and sent to the controller for processing.

Camera: It is a feature which is able to capture photographs and often record video in all the smartphones. The smartphone camera comprises of different components like a lens, sensors, software. The lens enables them to see pictures; Sensor takes what the lens sees and turns it into digital data, and the software analyzes the data and turns it into an image file that you can do something with.

How does the Camera work?

• The lens projects the image on the sensor
• the sensor senses the light and electronic signals are produced which are then transmitted on your screen.
• As you press the shutter button on the screen, the shutter goes off the sensor, and the sensor reads the image and transmits it to your screen, where you see the image.

Security: Mobile security can come in many appearances and patterns. Some protections are mounted directly into the phone device. For example, the default Autolock feature in iPhone that requires the user to enter a password after a few minutes of inactivity. Other mobile security protections are made into the network, such as reliable encryption standards for data traveling across cellular networks. Till now, due to advanced standards applied to mobile computing, we haven't seen data breach or security issue with smartphone technology. But then also, mobile users need to be aware of the common security threats and their preventions. Two of the most effective mobile security measures are remote lock and remote wipe. Many devices also include GPS tracking features to locate the phone or even activate "screaming" alarms.