Tuesday, 4 August 2015

Abdul Kalam

 
மிரட்டல் : 
 
பேப்பர் : ஏழ்மை காரணமாக தன் இளம் வயதிலேயே வீதி வீதியாக பேப்பர் போடும் வேலையை செய்தாராம் அப்துல் கலாம்..!

சராசரி : பள்ளியல் படிக்கும் போது, அப்துல் கலாம் ஒரு சராசரி மாணவர் தானாம்..!

கணிதம் : பெரிய அறிவியல் விஞ்ஞானியான அப்துல் கலாம், உண்மையில் பள்ளியில் இருந்தே, அறிவியலை விட கணித்த்தில் தான் அதிகம் கை தேர்ந்தவராம்.!


மிரட்டல் : காலாமின் சீனியர் கிளாஸ் ப்ராஜக்ட்டில் திருப்தி அடையாத 'டீன்' (DEAN) இன்னும் 3 நாட்களில் முடிக்கவில்லை எனில் காலாமின் உதவி தொகையை தர மாட்டேன் என்று மிரட்டினாராம்


சவால் : சொன்ன தேதிக்குள் ப்ராஜக்ட்டை முடித்து கொடுத்தாரம், அப்துல் கலாம்..!

பைலட் : ஒரு ராணுவ 'பைலட்'டாக ஆக வேண்டும் என்றுதான் கலாம் முதலில் ஆசைப்பட்டாராம்..!

இடம் : அதற்கான தேர்வில், முதலில் வரும் எட்டு பேர் மட்டுமே தகுதி பெறுவார்கள் என்ற நிலையில், ஒன்பதாவது இடத்தை பிடித்தாராம் - கலாம்..!

திருக்குறள் : அப்துல் காலம், ஒரு திருக்குறள் ( ஏ கிளாசிக் ஆஃப் குறள்ஸ்) அறிஞர் ஆவார், அவர் மேடை பேச்சுகளில் நிச்சயம் ஒரு திருக்குறளை நாம் கேட்கலாம்..!


 
அன்று : 
அன்று : இந்தியாவின் முதல் ராக்கெட் பாகங்கள் சைக்கிளில் வைத்தும், மாட்டு வண்டியில் வைத்தும் கொண்டு வரப்பட்டன, அதை பெரிய அளவில் கேலி செய்தன பிற நாடுகள்..!

இன்று : வளர்ந்த நாடுகள் அனைத்தும் இஸ்ரோவின் வளர்ச்சியை வாய் பிளந்து பார்த்துக் கொண்டிருக்கிறது, சில நாடுகல் இஸ்ரோவின் உதவியை நாடுகிறது. இதற்கெல்லாம் பிரதான காரணம் - டாக்டர் அப்துல் கலாம்..!


ஹெலிக்காப்பட்டர் :

ஹெலிக்காப்பட்டர் : 1960-இல் மெட்ராஸ் இன்ஸ்ட்டியூட் ஆஃப் டெக்னாலஜி-யில் படிப்பை முடித்த பின், டிபன்ஸ் ரிஸர்ச் அண்ட் டெவலப்மெண்ட்டில் இணைந்து இந்திய ராணுவத்திற்காக ஹெலிக்காப்பட்டர்களை உருவாக்கினார்..!


 
அரசு ஒப்புதல் : 1969-இல் அரசு ஒப்புதல் பெற்று, அந்த பணியில் மேலும் நிறைய என்ஜினீயர்கள் மற்றும் விஞ்ஞானிகளை இணைத்துக்கொண்டார்..!


எஸ்எல்வி-3 : இஸ்ரோவிற்கு இடமாற்றம் செய்த பின் அங்கு அவர் எஸ்எல்வி-3 க்கு ப்ராஜக்ட் டைரக்டராக பணியாற்றினார்..!


முதல் சாட்டிலைட் : எஸ்எல்வி 3 - இந்தியாவின் முதல் சாட்டிலைட் விண்கலமாகும்..!


பெரும் பலம் : 1980-களில் ஏவுகணை தயாரிப்பை முன்னடத்தினார். அந்த காலகட்டம் அக்னி, ப்ரித்திவ் போன்ற ஏவுகணைகள் ராணுவத்திற்கு பெரும் பலம் சேர்த்தன..!

ஆலோசகர் : பின் அப்துல் கலாம், அப்போதைய பிரதமரின் முக்கிய ஆலோசகராகவும் பணியாற்றினார்..!

பிரதமர் : பின் 2002-ஆம் ஆண்டு இந்தியாவின் 11-வது குடியரசு தலைவர் ஆனார்..!


உரை : ஐநா மற்றும் ஐரோப்பிய பாராளுமன்றத்தில் இவர் ஆற்றிய உரை வரலாற்று சிறப்பு வாய்ந்ததாகும்..!


பாராட்டு : உங்கள் எளிமையும், செயல்திறனும் ஒப்பிலாதது என்று பல தேசங்களில் பாராட்டு பெற்றவர்..!

உறக்கம் : ஒட்டு மொத்த இந்தியாவிற்கும் கனவு காண சொல்லிக் கொடுத்த மாமனிதர், நேற்று (27 ஜூலை 2015) மீளா உறக்கத்தில் ஆழ்ந்தார்..!



ஒரு மோடி ரசிகரின் கதை.. வாட்ஸ் ஆப்பில் ஒரு கலகல!

ஒரு மோடி ரசிகரின் கதை.. வாட்ஸ் ஆப்பில் ஒரு கலகல! 
 
 
 சென்னை: வாட்ஸ் ஆப்பில் ஒரு புது கலகல காமெடிக் கதை உலா வந்து கொண்டுள்ளது. இது ஒரு மோடி ரசிகரின் கதை என்று தலைப்பிட்டு வரும் அந்தக் காமெடிக் கதையை நீங்களும் படியுங்க
 
 ஒரு மோடி ரசிகரின் கதை 14 மாதங்களுக்கு முன்பு நரேந்திர மோடி பிரதமர் ஆவதைக் கண்டு ஆனந்தக் கூத்தாடி மயங்கி விழுந்து கோமாவுக்கு போன மோடியின் அதி தீவிர ரசிகர் ஒருவர் நேற்று மயக்கத்திலிருந்து எழுந்தார்!
A hilarious whatsapp story on Modi!
 
  எழுந்தவர் அருகிலிருந்த மருத்துவரிடம்....... 
- டாக்டர், ஊழலற்ற இந்தியாவுல இருக்கறது உங்களுக்கு எப்படி இருக்குது? - 
 
ராகுல்,ராபர்ட் வதேரா, சோனியா எல்லாரும் சிறையில் இருக்காங்களா? அல்லது இத்தாலிக்குத் தப்பி ஓடிட்டாங்களா? -
 
சுவிஸ் வங்கிகளில் இருந்து நம்ம நாட்டுக்கு எவ்வளவு கறுப்புப் பணம் திரும்பி வந்தது? -
 
ஒவ்வொரு இந்தியரும் மோடியிடமிருந்து 15 லட்சங்கள் பெற்ற பிறகு, ‘வறுமை' சுத்தமா ஒழிஞ்சிருக்குமே? -
 
அமெரிக்க டாலரின் மதிப்பு 35 ரூபாய்க்கு வந்துடுச்சா? -
 
பெட்ரோல், டீசல், கேஸ், தக்காளி, வெங்காயம், உருளைக்கிழங்கு எல்லாம் 
 
விலை குறைஞ்சி எல்லோரும் சந்தோஷமா இருக்காங்களா? -
 
பாகிஸ்தான் பயந்து நடுங்கி, தாவூத் இப்ராஹிமை இந்தியாவுக்குத் திருப்பி அனுப்பி இருக்கனுமே? - 
 
விவசாயிகள்கிட்ட இருந்து காங்கிரஸ் அபகரித்த நிலங்களை மோடி அவங்ககிட்டயே திருப்பிக் கொடுத்திருப்பாரே? அதனால விவசாயிகள் எல்லாம் மகிழ்ச்சியா இருப்பாங்களே?
 
 மோடியின் ரசிகரிடமிருந்து சரமாரியாக இவ்வளவு கேள்விகளைச் சமாளிக்க முடியாமல்..... அய்யோ... பாவம் மருத்துவர் கோமா நிலைக்குப் போய்விட்டார்!..

Read more at: http://tamil.oneindia.com/news/tamilnadu/a-hilarious-whatsapp-story-on-modi-232651.html

Tea Story


 Indian Chai: A British Propaganda? The Story of Tea in India


“Khadak chai aur garam samosa on a rainy sunday evening”. Doesn’t this resonate with almost every Indian? :)
chai_samosa
While it cannot be denied that Chai (Indian tea) has become an integral part of Indian lifestyle and is on its way to become the “national drink”, the process in which tea attained this status deserves to be a psychological case study, and is one of the best examples for nation-wide propaganda carried out by the British Crown (pre-independence) & subsequent Governments of India (post-independence). Let’s find out how this wonderful piping hot beverage (It has health benefits as well) managed to “invade” into our lives and got us hooked to it.
hanuman
One of the earliest references of a health potion in epics is that of the Sanjeevani herb in Ramayana, which some believe is a form of tea. Since the herb was used to restore life, it can be categorized as a divine herb and hence the arguments of Sanjeevani being a form of tea does not hold good.
The popular consensus among historians in the aspect of tea is that it had its origins in China in the 4th century BC as a stimulating drink, prepared by boiling tea leaves in water. While we are at it, let’s check out a popular Chinese anecdote throwing some light on the “accidental discovery” of Tea.
china_discovery
Legend has it that more 4,000 years ago in China, a divine farmer named Shennong, after a hard day’s work decided to boil some water in an open vessel and take a short nap under a Camellia (tea) tree. Dried leaves from the tree floated down into the boiling water, thereby resulting in the world’s first tea emanating delicious fragrance. Upon taking a sip of this “hot water”, Shennong felt energized & refreshed. Realizing that it must have been due to the blending of the leaves with boiling water, he announced his discovery to his fraternity and that’s how tea came into being.
The above anecdote has witnessed several adaptations over time to suit different geographies and cultures. In fact, there is one such story attributed to an Indian farmer as well who fell asleep while boiling water under a tea tree, but these are just legends and not documented facts. If one must go only by documented facts, the earliest mention of tea is in “Erya (Erh Ya)“, an ancient Chinese dictionary published in 350 BC. We can therefore safely assume that tea is atleast 2350 years old.
Back then, tea was used for ritual purposes and consumed only during special occasions. Later, as tea spread from China to Japan (during the propagation of Buddhism), it had become “mainstream” but still had the ceremonial status and even today, Japan holds tea in very high regard & is consumed as part of “tea ceremony”.
japanese_tea
By the 8th century, tea had gained widespread acceptance in China & Japan among the poor & working class also. Tea was not just a ritual drink but also a symbol of friendship & hospitality. However, there are still no documented references to tea in India in the 8th or even in the 10th century.

Electric Car

How old is the electric car?

Roger Wallace in an electric car in 1899.
How old are electric cars? Much older than you might think. Here's Roger Wallace perched atop his electric car in 1899.
National Motor Museum/Heritage Images/Getty Images
Electric vehicles (or EVs) are the next big thing — the cars that are revolutionizing the auto industry the way hybrids did less than two decades ago. The rollout of electric vehicle charging infrastructure is happening across the United States, slowly but surely. Some early EV models were considered experiments, sold or leased only in certain states. Plenty of people still worry that an EV won't get them where they need to go on a full charge and that charging might be complicated or inconvenient or leave them stranded. And then there's the issue of the cost: EVs are typically inexpensive to run, but buying one incurs a cost premium up front. (Some states have EV tax breaks that help, though.) No worries, the electric car advocates say, these concerns and complications are typical of new technology.
The funny thing is that electric cars aren't new technology. They go back to the days of, well, the car. Maybe not quite that far back, but pretty close. Early prototypes of electric cars actually date back to the early 1800s, coinciding somewhat with the development of the electric motor and the battery. Engineers in the United States and throughout Europe made plenty of progress, but it took a while for manufacturers to gather momentum.
By the 1890s, there were actually ten times as many electric cars sold as gasoline cars (and there were steam cars competing for a share of the market, too). One of the front-running electric cars was an Iowa-built vehicle designed by a chemist named William Morrison [source: Matulka]. It topped out at about 14 miles per hour (22.5 kilometers per hour), but it was popular, and competed with the likes of Studebaker and Oldsmobile, who were also making electric cars at the time (their gasoline-powered vehicles came later).
Electric cars enjoyed a good run through the turn of the century, but mass production proved to be their downfall. When all cars were hand built, it was a fair fight, but in 1910, the earliest modern assembly lines were introduced. Since gas-powered cars were the first to be put on the lines, their manufacturers had a financial advantage that electric car manufacturers just couldn't beat. Limited electric infrastructure was also a problem (foreshadowing our current EV revolution). Thus, gasoline won out as the preferred source of power, helped along by the immense popularity of Ford's inexpensive and accessible Model T. Electric vehicles were still made, but in very small numbers, for commercial or industrial purposes. A brief resurgence of electric cars occurred again in the 1990s, but they died off again completely before our current EV era began. Now, we've got choices ranging from subcompacts to genuine luxury cars, with plenty of new options on the way. Electric range has improved, and it's easier and more convenient than ever to find somewhere to recharge. The way today's EV manufacturers tout their accomplishments and modern technology, though, it's no surprise that the electric car seems like something completely new.

Monday, 13 July 2015

NANO TECHNOLOGY - A BRIEF EXPLANATION





Introduction to Nanotechnology


Definition – What is nanotechnology?

A word of caution
Truly revolutionary nanotechnology products, materials and applications, such as nanorobotics, are years in the future (some say only a few years; some say many years). What qualifies as "nanotechnology" today is basic research and development that is happening in laboratories all over the world. "Nanotechnology" products that are on the market today are mostly gradually improved products (using evolutionary nanotechnology) where some form of nanotechnology enabled material (such as carbon nanotubes, nanocomposite structures or nanoparticles of a particular substance) or nanotechnology process (e.g. nanopatterning or quantum dots for medical imaging) is used in the manufacturing process. In their ongoing quest to improve existing products by creating smaller components and better performance materials, all at a lower cost, the number of companies that will manufacture "nanoproducts" (by this definition) will grow very fast and soon make up the majority of all companies across many industries. Evolutionary nanotechnology should therefore be viewed as a process that gradually will affect most companies and industries.
Definition of nan'o•tech•nol'o•gy n
So what exactly is nanotechnology? One of the problems facing nanotechnology is the confusion about its definition. Most definitions revolve around the study and control of phenomena and materials at length scales below 100 nm and quite often they make a comparison with a human hair, which is about 80,000 nm wide. Some definitions include a reference to molecular systems and devices and nanotechnology 'purists' argue that any definition of nanotechnology needs to include a reference to "functional systems". The inaugural issue of Nature Nanotechnology asked 13 researchers from different areas what nanotechnology means to them and the responses, from enthusiastic to sceptical, reflect a variety of perspectives.
carbon nanotubes and human hair
Human hair fragment and a network of single-walled carbon nanotubes (Image: Jirka Cech)
It seems that a size limitation of nanotechnology to the 1-100 nm range, the area where size-dependant quantum effects come to bear, would exclude numerous materials and devices, especially in the pharamaceutical area, and some experts caution against a rigid definition based on a sub-100 nm size.
Another important criteria for the definition is the requirement that the nano-structure is man-made. Otherwise you would have to include every naturally formed biomolecule and material particle, in effect redefining much of chemistry and molecular biology as 'nanotechnology.'
The most important requirement for the nanotechnology definition is that the nano-structure has special properties that are exclusively due to its nanoscale proportions.
The U.S. National Nantechnology Initiatve (NNI) provides the following definition:
Nanotechnology is the understanding and control of matter at dimensions between approximately 1 and 100 nanometers, where unique phenomena enable novel applications. Encompassing nanoscale science, engineering, and technology, nanotechnology involves imaging, measuring, modeling, and manipulating matter at this length scale.
A nanometer is one-billionth of a meter. A sheet of paper is about 100,000 nanometers thick; a single gold atom is about a third of a nanometer in diameter. Dimensions between approximately 1 and 100 nanometers are known as the nanoscale. Unusual physical, chemical, and biological properties can emerge in materials at the nanoscale. These properties may differ in important ways from the properties of bulk materials and single atoms or molecules.
We found another good definition that is practical and unconstrained by any arbitrary size limitations (source):
The design, characterization, production, and application of structures, devices, and systems by controlled manipulation of size and shape at the nanometer scale (atomic, molecular, and macromolecular scale) that produces structures, devices, and systems with at least one novel/superior characteristic or property.

Nanotechnology Introduction - What is nanotechnology?

Nanotechnology Introduction - What is nanotechnology?

Tuesday, 12 May 2015

History of Indian Tricolor

"A flag is a necessity for all nations. Millions have died for it. It is no doubt a kind of idolatry which would be a sin to destroy. For, a flag represents an Ideal The unfurling of the Union Jack evokes in the English breast sentiments whose strength it is difficult to measure. The Stars and Stripes mean a world to the Americans. The Star and the Crescent will call forth the best bravery in Islam."

"It will be necessary for us Indians Muslims, Christians Jews, Parsis, and all others to whom India is their home-to recognize a common flag to live and to die for."

- Mahatma Gandhi
Every free nation of the world has its own flag. It is a symbol of a free country. The National Flag of India was designed by Pingali Venkayyaand and adopted in its present form during the meeting of Constituent Assembly held on the 22 July 1947, a few days before India's independence from the British on 15 August, 1947. It served as the national flag of the Dominion of India between 15 August 1947 and 26 January 1950 and that of the Republic of India thereafter. In India, the term "tricolour" refers to the Indian national flag.
The National flag of India is a horizontal tricolor of deep saffron (kesari) at the top, white in the middle and dark green at the bottom in equal proportion. The ratio of width of the flag to its length is two to three. In the centre of the white band is a navy blue wheel which represents the chakra. Its design is that of the wheel which appears on the abacus of the Sarnath Lion Capital of Ashoka. Its diameter approximates to the width of the white band and it has 24 spokes.

Evolution of the Tricolour

It is really amazing to see the various changes that our National Flag went through since its first inception. It was discovered or recognised during our national struggle for freedom. The evolution of the Indian National Flag sailed through many vicissitudes to arrive at what it is today. In one way it reflects the political developments in the nation. Some of the historical milestones in the evolution of our National Flag involve the following:

Unofficial flag of India
in 1906


The Berlin committee
flag, first raised by
Bhikaiji Cama in 1907


The flag used during the
Home Rule movement
in 1917


The flag unofficially
adopted in 1921


The flag adopted in 1931.
This flag was also the
battle ensign of the
Indian National Army


The present Tricolour
flag of India
The first national flag in India is said to have been hoisted on August 7, 1906, in the Parsee Bagan Square (Green Park) in Calcutta now Kolkata. The flag was composed of three horizontal strips of red, yellow and green.
The second flag was hoisted in Paris by Madame Cama and her band of exiled revolutionaries in 1907 (according to some inl9OS). This was very similar to the first flag except that the top strip had only one lotus but seven stars denoting the Saptarishi. This flag was also exhibited at a socialist conference in Berlin.
The third flag went up in 1917 when our political struggle had taken a definite turn. Dr. Annie Besant and Lokmanya Tilak hoisted it during the Home rule movement. This flag had five red and four green horizontal strips arranged alternately, with seven stars in the saptarishi configuration super-imposed on them. In the left-hand top corner (the pole end) was the Union Jack. There was also a white crescent and star in one corner.
During the session of the All India Congress Committee which met at Bezwada in 1921 (now Vijayawada) an Andhra youth prepared a flag and took it to Gandhiji. It was made up of two colours-red and green-representing the two major communities i.e. Hindus and Muslims. Gandhiji suggested the addition of a white strip to represent the remaining communities of India and the spinning wheel to symbolise progress of the Nation.
The year 1931 was a landmark in the history of the flag. A resolution was passed adopting a tricolor flag as our national flag. This flag, the forbear of the present one, was saffron, white and green with Mahatma Gandhi's spinning wheel at the center. It was, however, clearly stated that it bore no communal significance and was to be interpreted thus.
On July 22, 1947, the Constituent Assembly adopted it as Free India National Flag. After the advent of Independence, the colours and their significance remained the same. Only the Dharma Charkha of Emperor Asoka was adopted in place of the spinning wheel as the emblem on the flag. Thus, the tricolour flag of the Congress Party eventually became the tricolour flag of Independent India.

Colours of the Flag:

In the national flag of India the top band is of Saffron colour, indicating the strength and courage of the country. The white middle band indicates peace and truth with Dharma Chakra. The last band is green in colour shows the fertility, growth and auspiciousness of the land.

The Chakra:

This Dharma Chakra depicted the "wheel of the law" in the Sarnath Lion Capital made by the 3rd-century BC Mauryan Emperor Ashoka. The chakra intends to show that there is life in movement and death in stagnation.

Flag Code

On 26th January 2002, the Indian flag code was modified and after several years of independence, the citizens of India were finally allowed to hoist the Indian flag over their homes, offices and factories on any day and not just National days as was the case earlier. Now Indians can proudly display the national flag any where and any time, as long as the provisions of the Flag Code are strictly followed to avoid any disrespect to the tricolour. For the sake of convenience, Flag Code of India, 2002, has been divided into three parts. Part I of the Code contains general description of the National Flag. Part II of the Code is devoted to the display of the National Flag by members of public, private organizations, educational institutions, etc. Part III of the Code relates to display of the National Flag by Central and State governments and their organisations and agencies.
There are some rules and regulations upon how to fly the flag, based on the 26 January 2002 legislation. These include the following:

The Do's:

  • The National Flag may be hoisted in educational institutions (schools, colleges, sports camps, scout camps, etc.) to inspire respect for the Flag. An oath of allegiance has been included in the flag hoisting in schools.
  • A member of public, a private organization or an educational institution may hoist/display the National Flag on all days and occasions, ceremonial or otherwise consistent with the dignity and honour of the National Flag.
  • Section 2 of the new code accepts the right of all private citizens to fly the flag on their premises.

The Don'ts

  • The flag cannot be used for communal gains, drapery, or clothes. As far as possible, it should be flown from sunrise to sunset, irrespective of the weather.
  • The flag cannot be intentionally allowed to touch the ground or the floor or trail in water. It cannot be draped over the hood, top, and sides or back of vehicles, trains, boats or aircraft.
  • No other flag or bunting can be placed higher than the flag. Also, no object, including flowers or garlands or emblems can be placed on or above the flag. The tricolour cannot be used as a festoon, rosette or bunting.
More information on Flag Code of India (PDF file that opens in a new window)
The Indian National Flag represents the hopes and aspirations of the people of India. It is the symbol of our national pride. Over the last five decades, several people including members of armed forces have ungrudgingly laid down their lives to keep the tricolour flying in its full glory.