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Showing posts with the label Science for the young

Artificial light pollution

            Depleting natural resources and degradation of the environment is a primary contemporary preoccupation of environmentalists today. Air pollution, water pollution, noise pollution, ozone depletion, green house effect are issues we are familiar with.  A relatively new concern is that of Light pollution. For the past few years environmentalists have been researching on the harmful effects of light pollution. This is a phenomenon now fairly common in the cities of developed nations of the world. Changing lifestyles, shifts in workplace demands of both customers and retailers, are some of the reasons that have led to the presence of a fairly active night life which consequently poses demands on artificial light requirements. This is the primary cause for Light Pollution. How and when does Light Pollution occur?             When excessive artificial lighting enters the ...

Biometrics in brief

                                     Everyday actions are increasingly being handled electronically, rather than through the use of pen, paper or face-to-face interaction. The technique of studying and electronically capturing the physical characteristics of a person is called Biometrics. The physical characteristics studied may include finger prints, hand geometry, eye-structure or voice pattern. Biometrics involves using these physical characteristics as a password or a form of identification. The need for biometrics can be found in the central, state and local governments as well as in the military. With rapid growth in electronic commercial transactions there is a great demand for fast and accurate user identification. There are broadly three different types of user identification: 1) Something the user knows – A password, a PIN (personal identification number), or a piece ...

And that's what the parasail said..

                             Hello! Glad to meet you. My name is Waterbird. I am a parasail. Never heard of me? Well now you have! It’s time to get to know me. Come along let me tell you about myself and my exciting life. How was I born? You must’ve seen parachutes, the round objects with the help of which ‘people’ come down from aircrafts.  Right? Well these ‘people’ are usually pilots, sky jumpers and other such professionals. Pierre Lamoigne an instructor was trying to teach his pilots ‘how to come down with a parachute’. It was quite a complicated task taking them up in the aircraft each time for the training practice. Pierre hit upon a bright idea for the practice sessions. The parachute with the ‘flyer; was attached to a jeep. When the jeep pulled along the parachute filled up with air and the pilot was gradually ‘lifted’ up in to the air. This is very similar to ...