Saturday, December 31, 2011

Cloud Computing in Simple Terms

Cloud computing is a technology that uses the internet and central remote servers to maintain data and applications. Cloud computing allows consumers and businesses to use applications without installation and access their personal files at any computer with internet access. This technology allows for much more efficient computing by centralizing storage, memory, processing and bandwidth.

A simple example of cloud computing is Yahoo email, Gmail, or Hotmail etc. You dont need a software or a server to use them. All a consumer would need is just an internet connection and you can start sending emails. The server and email management software is all on the cloud ( internet) and is totally managed by the cloud service provider Yaho , Google etc. The consumer gets to use the software alone and enjoy the benefits. 

The analogy is , 'If you need milk , would you buy a cow ?' All the users or consumers need is to get the benefits of using the software or hardware of the computer like sending emails etc. Just to get this benefit (milk) why should a consumer buy a (cow) software /hardware ? Cloud computing is broken down into three segments: "application" "storage" and "connectivity." Each segment serves a different purpose and offers different products for businesses and individuals around the world.

Tuesday, December 20, 2011


An Actuator is something that converts energy into motion. It also can be used to apply a force. An actuator typically is a mechanical device that takes energy, usually energy that is created by air, electricity or liquid, and converts it into some kind of motion. That motion can be in virtually any form, such as blocking, clamping, ejecting or many other types of motion.

In simple words, an actuator that generates linear motion or movement is called Linear Actuator. Most of these actuators are operated using hydraulic or mechanical actuation techniques and they are using non-linear motion as their input. Electric Linear Actuators are most suitable for the movement of final control elements which require linear movement. The rotary to linear conversion is done without any wear and thrust rod can transfer force directly to the final element. 

Many actuators are designed to be used in hazardous areas. They are operated by standard electronic units. Literally hundreds of actuators are available in the market. One needs to understand the required force, rated speed, maximum stroke range, and whether explosion protection is needed or not. Then one can select appropriate linear actuator for their needs. A standard linear actuator commonly has the motor as a separate cylinder attached to the side of the actuator, It is attached either in parallel way with the actuator or it sticks out to the side 90 degrees to the actuator. Motion control also plays an important role in the working of this device.The motor may also be attached to the back of the actuator. The drive motor has a solid drive shaft. This shaft is geared to the drive nut or drive screw.