Thursday, July 24, 2008

Keep the Spark

Inaugural Speech for the new batch at the Symbiosis BBA program 2008

© Chetan Bhagat

Good Morning everyone and thank you for giving me this chance to speak to you. This day is about you. You, who have come to this college, leaving the comfort of your homes (or in some cases discomfort), to become something in your life. I am sure you are excited. There are few days in human life when one is truly elated. The first day in college is one of them. When you were getting ready today, you felt a tingling in your stomach. What would the auditorium be like, what would the teachers be like, who are my new classmates - there is so much to be curious about. I call this excitement, the spark within you that makes you feel truly alive today. Today I am going to talk about keeping the spark shining. Or to put it another way, how to be happy most, if not all the time.

Where do these sparks start? I think we are born with them. My 3-year old twin boys have a million sparks. A little Spiderman toy can make them jump on the bed. They get thrills from creaky swings in the park. A story from daddy gets them excited. They do a daily countdown for birthday party – several months in advance – just for the day they will cut their own birthday cake.

I see students like you, and I still see some sparks. But when I see older people, the spark is difficult to find. That means as we age, the spark fades. People whose spark has faded too much are dull, dejected, aimless and bitter. Remember Kareena in the first half of Jab We Met vs the second half? That is what happens when the spark is lost. So how to save the spark?

Imagine the spark to be a lamp's flame. The first aspect is nurturing - to give your spark the fuel, continuously. The second is to guard against storms.

To nurture, always have goals. It is human nature to strive, improve and achieve full potential. In fact, that is success. It is what is possible for you. It isn't any external measure - a certain cost to company pay package, a particular car or house.

Most of us are from middle class families. To us, having material landmarks is success and rightly so. When you have grown up where money constraints force everyday choices, financial freedom is a big achievement.

But it isn't the purpose of life. If that was the case, Mr Ambani would not show up for work. Shah Rukh Khan would stay at home and not dance anymore. Steve Jobs won't be working hard to make a better iPhone, as he sold Pixar for billions of dollars already. Why do they do it? What makes them come to work everyday?

They do it because it makes them happy. They do it because it makes them feel alive. Just getting better from current levels feels good. If you study hard, you can improve your rank. If you make an effort to interact with people, you will do better in interviews. If you practice, your cricket will get better. You may also know that you cannot become Tendulkar, yet. But you can get to the next level. Striving for that next level is important.

Nature designed with a random set of genes and circumstances in which we were born. To be happy, we have to accept it and make the most of nature's design. Are you? Goals will help you do that.

I must add, don't just have career or academic goals. Set goals to give you a balanced, successful life. I use the word balanced before successful. Balanced means ensuring your health, relationships, mental peace are all in good order.

There is no point of getting a promotion on the day of your breakup. There is no fun in driving a car if your back hurts. Shopping is not enjoyable if your mind is full of tensions.

You must have read some quotes - Life is a tough race, it is a marathon or whatever. No, from what I have seen so far, life is one of those races in nursery school. Where you have to run with a marble in a spoon kept in your mouth. If the marble falls, there is no point coming first. Same with life, where health and relationships are the marble. Your striving is only worth it if there is harmony in your life. Else, you may achieve the success, but this spark, this feeling of being excited and alive, will start to die.

One last thing about nurturing the spark - don't take life seriously. One of my yoga teachers used to make students laugh during classes. One student asked him if these jokes would take away something from the yoga practice. The teacher said - don't be serious, be sincere. This quote has defined my work ever since. Whether its my writing, my job, my relationships or any of my goals. I get thousands of opinions on my writing everyday. There is heaps of praise, there is intense criticism. If I take it all seriously, how will I write? Or rather, how will I live? Life is not to be taken seriously, as we are really temporary here. We are like a pre-paid card with limited validity. If we are lucky, we may last another 50 years. And 50 years is just 2,500 weekends. Do we really need to get so worked up? It's ok, bunk a few classes, goof up a few interviews, fall in love. We are people, not programmed devices.

I've told you three things - reasonable goals, balance and not taking it too seriously that will nurture the spark. However, there are four storms in life that will threaten to completely put out the flame. These must be guarded against. These are disappointment, frustration, unfairness and loneliness of purpose.

Disappointment will come when your effort does not give you the expected return. If things don't go as planned or if you face failure. Failure is extremely difficult to handle, but those that do come out stronger. What did this failure teach me? is the question you will need to ask. You will feel miserable. You will want to quit, like I wanted to when nine publishers rejected my first book. Some IITians kill themselves over low grades – how silly is that? But that is how much failure can hurt you.

But it's life. If challenges could always be overcome, they would cease to be a challenge. And remember - if you are failing at something, that means you are at your limit or potential. And that's where you want to be.

Disappointment's cousin is frustration, the second storm. Have you ever been frustrated? It happens when things are stuck. This is especially relevant in India. From traffic jams to getting that job you deserve, sometimes things take so long that you don't know if you chose the right goal. After books, I set the goal of writing for Bollywood, as I thought they needed writers. I am called extremely lucky, but it took me five years to get close to a release.

Frustration saps excitement, and turns your initial energy into something negative, making you a bitter person. How did I deal with it? A realistic assessment of the time involved – movies take a long time to make even though they are watched quickly, seeking a certain enjoyment in the process rather than the end result – at least I was learning how to write scripts , having a side plan – I had my third book to write and even something as simple as pleasurable distractions in your life - friends, food, travel can help you overcome it. Remember, nothing is to be taken seriously. Frustration is a sign somewhere, you took it too seriously.

Unfairness - this is hardest to deal with, but unfortunately that is how our country works. People with connections, rich dads, beautiful faces, pedigree find it easier to make it – not just in Bollywood, but everywhere. And sometimes it is just plain luck. There are so few opportunities in India, so many stars need to be aligned for you to make it happen. Merit and hard work is not always linked to achievement in the short term, but the long term correlation is high, and ultimately things do work out. But realize, there will be some people luckier than you.

In fact, to have an opportunity to go to college and understand this speech in English means you are pretty darn lucky by Indian standards. Let's be grateful for what we have and get the strength to accept what we don't. I have so much love from my readers that other writers cannot even imagine it. However, I don't get literary praise. It's ok. I don't look like Aishwarya Rai, but I have two boys who I think are more beautiful than her. It's ok. Don't let unfairness kill your spark.

Finally, the last point that can kill your spark is isolation. As you grow older you will realize you are unique. When you are little, all kids want Ice cream and Spiderman. As you grow older to college, you still are a lot like your friends. But ten years later and you realize you are unique. What you want, what you believe in, what makes you feel, may be different from even the people closest to you. This can create conflict as your goals may not match with others. . And you may drop some of them. Basketball captains in college invariably stop playing basketball by the time they have their second child. They give up something that meant so much to them. They do it for their family. But in doing that, the spark dies. Never, ever make that compromise. Love yourself first, and then others.

There you go. I've told you the four thunderstorms - disappointment, frustration, unfairness and isolation. You cannot avoid them, as like the monsoon they will come into your life at regular intervals. You just need to keep the raincoat handy to not let the spark die.

I welcome you again to the most wonderful years of your life. If someone gave me the choice to go back in time, I will surely choose college. But I also hope that ten years later as well, you eyes will shine the same way as they do today. That you will Keep the Spark alive, not only through college, but through the next 2,500 weekends. And I hope not just you, but my whole country will keep that spark alive, as we really need it now more than any moment in history. And there is something cool about saying - I come from the land of a billion sparks.


Friday, July 11, 2008

Higher-Density Data Storage

Higher-Density Data Storage

A novel nanolaser could cram more data onto a hard disk.

By Prachi Patel-Predd


Spot light: To make a laser that focuses nanowatts of power into a 30-nanometer spot, researchers cover a semiconductor diode with an aluminum film etched with different nanoscale apertures. A scanning near-field optical-microscope image shows that the most laser light comes out from the C-shaped aperture.
Credit: Rabee Ikkawi, University of California, Riverside

A laser that focuses light into a 30-nanometer-wide spot could be an important advance toward ultra-high-density hard disks. Researchers at the University of California, Riverside (UCR), and at the University of Houston, in Texas, who have developed the nanolaser, say that it could lead to hard disks with 10 terabits of data packed into a square inch.

Today, hard disks can carry up to 200 gigabits per square inch. Data is stored magnetically. Using existing technology, manufacturers could increase a disk's capacity to at most one terabit per square inch. The nanolaser is an important step toward a disk-writing system that many researchers are currently working on. Such a system would use both light and magnetic fields to store data on a disk, packing up to 50 terabits per square inch of data.

The smaller the light spot of the laser, the smaller the bit size, which means more bits per square inch. Right now, the laser can concentrate 250 nanowatts of power on a 30-nanometer-wide spot. "Our technology can be scaled down to 5 to 10 nanometers for sure," says Sakhrat Khizroev, an electrical-engineering professor who is leading the work at UCR. A 10-nanometer spot size should be small enough to get a density of 10 terabits per square inch.

Present-day magnetic storage technology has doubled data density on hard disks nearly every year for the past three decades. But now the technology is approaching its limit. On a hard disk, each bit is a tiny area in which the material's crystals all have their magnetic fields aligned in the same direction. As more data is recorded on a disk, bits get smaller and comprise fewer crystals of the material. At about one terabit per square inch, the bit areas become so tiny that the crystals do not have enough energy to keep their magnetic fields aligned, and the bits end up losing their information.

Hard-disk manufacturers such as Seagate are now looking at a new method to store more data on disks. The technique, called heat-assisted magnetic recording, involves using a tightly focused light spot to heat up the bits when they are being recorded. This gives the magnetic crystals energy to retain their magnetic-field orientations. "There are various ways one could imagine bringing light on the disk," says Mark Kryder, an electrical- and computer-engineering professor at Carnegie Mellon University. "The most elegant way would be to use a nanolaser."

So far, the challenge has been to make a laser that delivers sufficient energy into a small enough light spot. With previous lasers, Khizroev says, "the light, when focused on a 30-nanometer spot size, has energies that are a fraction of a nanowatt." He and his colleagues make their 250-nanowatt laser by depositing a very thin layer of aluminum on the emitting side of a semiconductor diode laser. Then they focus a beam of positive gallium ions on the aluminum to etch tiny nanoscale apertures. As predicted by physics theory, a C-shaped aperture lets the most energy come through into the smallest spot size. Khizroev says that his colleagues are now trying to engineer the laser with an even smaller spot size of 5 to 10 nanometers.

Ed Schlesinger, head of the Electrical and Computer Engineering department at Carnegie Mellon, says that the new nanolaser is "an important aspect of making heat-assisted magnetic recording a reality." But he cautions that there are many engineering challenges to solve before the technology can be brought to market. They include mounting the laser on a slider so that it can move to various areas of the hard disk to record data, designing a new disk material that works with heat-assisted recording, and making disk lubricants that can handle the high temperatures during the heat-assisted writing process.

"Heat-assisted magnetic recording is a real systems problem and requires development and progress on a lot of fronts simultaneously," Schlesinger says. "The nanolaser is a nice step forward and brings the technology closer."

Monday, July 7, 2008

Researchers Pencil In Graphene Transistors

Graphene's weird electrical properties allow for smallest transistor yet.
IMAGE: Anna Demian/Randi Silberman

Pushing Pencils: Graphene, found in pencil marks, is a candidate material for making future transistors. It's extracted from graphite crystals [right] using sticky tape.

The little smudges you leave behind whenever you use a pencil could be the key ingredient of the next revolution in computer circuitry, according to experts around the globe. Part of what shears off from the graphite in a pencil is a substance known as graphene, a one-atom-thick crystal with remarkable electrical properties that may overcome the physical limits silicon faces as transistors shrink to ever-smaller sizes.

Silicon's remarkable run as ruler of the chip world may be nearing an end as engineers eventually lose the ability to make faster silicon transistors by making them smaller. In the hunt for what comes next, carbon nanotubes have gotten a big chunk of the attention, but if the current explosion of research activity is any indication, it may be graphene that wins in the end. This spring saw a flurry of breakthroughs surrounding graphene, culminating in the creation of what may be the smallest transistor ever made—one atom thick by 10 to 50 atoms wide.

Like carbon nanotubes, graphene is a crystal structure of carbon atoms but arranged in a flat plane instead of a cylinder. The electrons in graphene behave as if they have no mass. Like photons—but unlike electrons in other materials—the electrons move at a constant speed, regardless of how much energy each one has.

A transistor built out of graphene, therefore, should operate much faster than a comparable one made from silicon. Michael S. Fuhrer, a physicist at the University of Maryland's Center for Nanophysics and Advanced Materials, recently showed that at room temperature electrons in graphene move at 200000 centimeters per second for every volt per centimeter of electric field, 100 times faster than in silicon. “All other things being equal, that would translate into a 100 times faster transistor,” he says.

Graphene has been known for decades as a single plane of graphite, but it was only in 2004 that Andre Geim and Kostya Novoselov of the University of Manchester, England, were able to isolate it by the simple act of pressing a piece of tape to a graphite crystal and placing it on a silicon substrate. In April, the two researchers described their transistor, 10 to 50 atoms wide and built by etching a pattern into graphene. [read more]