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Camouflage objects using Nano-Mirage Effect
Everyone of us was astonished by seeing the camouflage effect in the James bond movie. It was a brilliance of visual effects. But ever wondered if it works for real. Yes!!! The scientists are on the verge of the discovery of it.[youtube video_id=”UPFBPxFDFB8″ width=”880″ height=”495″]The mechanism has now been developed by researchers at the University of Texas at Dallas. They were able to detect a unique characteristic in carbon nano-tubes with a kind of mirage effect which helps to switch on and turn off invisibility on demand .Scientists have created a working cloaking device that not only takes advantage of one of nature’s most bizarre phenomenon, but also boasts unique features. It has an ‘on and off’ switch and is best used underwater.The Carbon Nano Tubes (CNT) exploits the mirage effect for this mechanism .It has ability to conduct heat and transfer it to surrounding areas that makes them an ideal material to exploit the so-called “mirage effect”.Water on the highway and desert is frequently seen it is because of the Mirage effect (an optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky) .Due to this the observer sees a pool of water in the ground .this occurs because the air near the ground is a lot warmer than the air higher up, causing light rays to bend upward towards the viewer’s eye rather than bounce off the surface.This results in an image of the sky appearing on the ground which the viewer perceives as water actually reflecting the sky; the brain sees this as a more likely occurrence.CNT’s which are highly aligned can be easily heated to a higher temperature by electrical stimulation .They have ability to transfer the heat to the surroundings causing a steep temperature gradient,this causes the light rays to bend away from the object concealed behind the device, making it appear invisible.
Secure Online Auction System
Online auction however is a different business model where the items are sold through price bidding. Usually bidding have start price and ending time. Potential buyers in auction and the winner is the one who bids the item for highest price. We treat the fraud detection with a binary classification. For buying product online user have to provide his personal details like email address, license number, PAN number etc. Only the valid user will have authority to bid. This prevents various frauds according in online shopping.Only authorized and verified customer can participate in auction.Fraud customer or seller gets detect in early stages and measure to prevent it.Authenticate legitimate users can buy the product online very efficiently and securely with the help of this systemThe products for auction does not need any physical locationThe bidder can participate in auction from anywhere at anytime through online auction.DisadvantagesCustomer can view only the product picture and some details on the auction website, which may lead to lack of product genuineness.
Secure E Learning Using Data Mining Techniques
In today’s lifestyle every task has been executed by help of internet. The online system or the internet facilities getting more popular as well as its becoming part of human lifestyle. Now in days every individual recommends that learning should at any-place and any-time, and this recommendation is resolved by E-Learning system. Secure E-learning has been divided into two parts Data Security and user flexibility. E-learning has huge database which carries lots of student records, course records, course materials and so on. In this system user security provided by the admin, admin himself authorize to candidate to enter into the system. Course material also has been secured by using file encryption and decryption technique so that no one can access material outside the platform.

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