Tuesday, 16 February 2016

New Technology-Hollow Flashlight



Ann Makosinski is a 16-year-old student who competed against thousands of other young inventors from around the world to win first prize and a $25,000 scholarship at Google's International Science Fair.
She invented a battery-free flashlight. A free energy device that is powered by the heat in your hand.
While visiting the Philippines, Ann found that many students couldn't study at home because they didn't have electricity for lighting.

                                  Unfortunately, this is a common problem for developing regions where people don't have access to power grids or can't afford the cost of electricity.
Ann recalled reading how the human body had enough energy to power a 100-watt light bulb.
This inspired her to think of how she could convert body heat directly into electricity to power a flashlight. She knew that heated conductive material causes electrons to spread outwards and that cold conductive material causes electrons to condense inwards.

                    So, if a ceramic tile is heated, and it's pressed against a ceramic tile that is cool, then electrons will move from the hot tile towards the cool tile producing a current.
This phenomena is known as the thermoelectric effect.image of parts of no-battery flashlight
Ann started using ceramic tiles placed on top of each other with a conductive circuit between them (known as Peltier tiles) to create the amount of electricity she needed for her flashlight.

      Her idea was to design her flashlight so that when it was gripped in your hand, your palm would come in contact with the topside of the tiles and start heating them.
To ensure the underside of the tiles would be cooler, she had the tiles mounted into a cut-out area of a hollow aluminum tube.
                               This meant that air in the tube would keep the underside of her tiles cooler than the heated topside of the tiles. This would then generate a current from the hot side to the cold side so that light emitting diodes (LEDS) connected to the tiles would light-up.


But although the tiles generated the necessary wattage (5.7 milliwatts), Ann discovered that the voltage wasn't enough. So she added a transformer to boost the voltage to 5V, which was more than enough to make her flashlight work.
                                             Ann successfully created the first flashlight that didn't use batteries, toxic chemicals, kinetic or solar energy, and that always works when you picked it up.
She credits her family for encouraging her interest in electronics and derives her inspiration from reading about inventors such as Nikola Tesla and Marie Curie.
                                               She told judges at the Google competition that her first toy was a box of transistors.Time Magazine listed Ann as one of the 30 people under 30 who are changing the world.
She is working on bringing her flashlight to market and is also developing a headlamp based on the same technology.


new technology -Transparent Smartphones



Inventors, Jung Won Seo, Jae-Woo Park, Keong Su Lim, Ji-Hwan Yang and Sang Jung Kang, who are scientists at the Korean Advanced Institute of Science and Technology, have created the world's first transparent computer chip.

The chip, known as (TRRAM) or transparent resistive random access memory, is similar to existing chips known as (CMOS) or metal-oxide semiconductor memory, which we use in new electronics.
The difference is that TRRAM is completely clear and transparent. What is the benefit of having transparency?
"It is a new milestone of transparent electronic systems," says Jung Won Seo. "By integrating TRRAM with other transparent electronic components, we can create a total see-through embedded electronic systems."
The technology could enable the windows or mirrors in your home to be used as computer monitors and television screens.
This technology is expected to be available within 3 to 4 years.

Sunday, 14 February 2016

Fault makers are majority, even they protected in most situations.(tamil)

இரண்டு ரயில் தண்டவாளம் அருகருகே
இருக்கு..

ஒன்றில் எப்பவுமே ரயில் வராது....
மற்றொன்றில் ரயில் அடிக்கடி வரும்...

ரயில் வராத தண்டவாளத்தில் ஒரு குழந்தை
விளையாடிக் கொண்டிருக்கிறது.

ரயில் வரும் தண்டவாளத்தில் பத்து குழந்தைகள் விளையாடிக்கொண்டிருக்கிறது.

அத்தருணத்தில் ரயில் வருகிறது....தூரத்தில்
இதனை நீங்கள் பார்க்கிறீர்கள்..உங்களுக்கு
அருகே ட்ராக் மாற்றும் கருவி இருக்கிறது...

நீங்கள் யாரை காப்பாற்றுவீர்கள்....??
இப்படி ஒரு கேள்வியை நேற்று ஒரு விழாவில் ஒருவர் கேட்டார்...

ப்ரக்டிகலாக பதில் சொல்லனும் நாம் யாரும் சூப்பர் மேன் இல்லையென்றும் சொன்னார்..

உண்மையாக நாம் என்ன செய்வோம்...??

ஒரு குழந்தை விளையாடும் இடத்திற்கு தானே ட்ராக்கை மாற்றிவிடுவோம்..
ஏனெனில் 10 குழந்தைகள் காப்பாற்றப்படுமே என்றார்....

உண்மை தான் என்றோம்...

இன்றைய சமூகமும் இப்படித்தான் உள்ளது.
ரயில் வரும் என்று தெரிந்து தப்பு செய்யும்
குழந்தைகள் காப்பற்றபடுகிறது...

ரயில் வராத இடத்தில் யாருக்கும் தொந்தரவு தராமல் தப்பே செய்யாத குழந்தை தண்டனை பெறுகிறது....

இன்றைய சூழலில் நம் வாழ்கையும், நம் நாடும் இப்படிதான் இருக்கிறது என்று அழகாக சொல்லி முடித்தார்...

Fault makers are majority, even they protected in most situations.

இன்றை நிலை "நல்லதையே தனியாக செய்பவன் தண்டிக்கபடுகிறான்...
தவறையே கூட்டமாக செய்பவர்கள்
தப்பித்துக்கொள்கிறார்கள்"