Confessions of a researchaholic

2009-09-23

Life and Monte Carlo sampling

Filed under: Imaginary,Real — liyiwei @ 10:47 am
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I spotted this very interesting article today from a friend’s facebook posting.

I thought about this very similar issue before, and I could not resist the analogy between life and Monte Carlo ray tracing: each individual is a like a stochastic ray that samples a particular path, and in the end a grand entity (e.g. God for the creationists or natural selection for the Darwinists) renders the future by summing up all our individual contributions. In both cases each individual is allowed to sample only one path; there might be imperfections for each individual path but the grand entity only cares about the soundness of their joint statistics.

2009-09-02

Bolivian red quinoa

Filed under: Real — liyiwei @ 1:25 pm
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I had this special kind of grain for lunch in the company cafeteria today. The Bolivian red quinoa is mixed with roasted vegetables, and sided with corns plus carrots.

The red quinoa is crunch and delicious. It is also entirely vegetarian.

I am impressed by the creativity of the cafeteria in my current office building.

Bolivian red quinoa

2009-07-20

Birthday

Filed under: Real — liyiwei @ 4:00 am
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Instead of throwing parties and receiving gifts, I believe it is more logical to celebrate birthday by expressing gratefulness to those who have helped my state of existence.

However, this deems too board a target and I will end up thanking almost everyone and everything, starting from the universe all the way to the individual molecules of my body.
To make things feasible, let me narrow down the range by picking a quality about myself that I consider to be both important and unique.

I have to begin with my parents. I owe them both my nature and nurture, and for both they gave me the very best.

My grandfather, also my first teacher, provided the pivotal role of molding my innate interest in pursue of intellectual activities at a very early age. (I could still recite some of the Chinese classics he taught me while in kindergarten.) Through him I found that studying is one of the most wonderful experiences in the world. With a good book in hand or a good topic to research, I could feel the most supreme serenity in the most chaotic corner of the world.

Thanks to all the bully kids in my neighborhood and school who ever beat me up. They made me realize, in a very early age, that best way to survive and revenge is to out-smart instead of out-muscle them.

For unknown reasons, I have great difficulty following classroom lectures. I realized this at around age 12, and was lucky enough to have high school teachers who let me learn things myself without classroom participation. I was even granted the privilege to study alone in the school library located inside the girls building. This is a lot of trust, considering the conservative nature of the high school which segregated boys and girls. (Imagine the response from my classmates.)

And thanks to my college professors who allowed me to continue skip classes. They are all excellent teachers, but I continue to have problem attending lectures. Luckily, all these years of self study in high school and college provided important foundation for my ability in independent research.

I would like to thank my Ph.D. adviser in Stanford, who not only gave me the freedom to pursue subjects but also showed me the fundamentals in conducting research. One of the most important lessons I learned from him is that research is an iterative process. Thus, instead of shooting for perfection in the first try, just go ahead and do it. Since that I have always started writing papers from day 1 when I have the rough idea, and keep updating the paper along with my progress. I have found this the best way to manage a project, and to keep my sanity when multi-tasking with several papers and collaborators.

I feel extremely lucky to marry a girl who could let me do my things without much disturbance.

Upon my graduation I joined a company that needed me to follow orders. It did not take long to realize that I might not be the best fit for that if I could not even follow school lectures. Thanks to the patience and understanding of my former colleagues, I learned the importance lesson of never trying to be someone that I am not.

I would like to thank the managers of my current company for giving me the freedom to conduct research, and the students I have collaborated with, who helped me broaden my subject scope and improve my skills for teaching and advising.

Thanks to all these people, I have the privilege to be a (de facto) sovereign researcher with the confidence and ability to pursue answers for any questions that pop up in my mind. There is nothing better for me in the world.

2009-07-15

First encounter with Ciao

Filed under: Real — liyiwei @ 4:40 pm
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A good friend of mine, Ciao, is relocating to another part of the world.

Ciao is a very nice dude, and we have had a lot of fun hanging out together. Perhaps the funniest ever experience is our first encounter, when Ciao went to interview with a company that I previously worked for.

I guess most companies have a certain interviewing style that reflects the company culture. And for that particular company, the custom seems to be grilling the interviewees with trick questions, mostly in low-level math and computer science. I could see the value of such a style in testing the interviewee’s character and intellect, but I simply couldn’t bring myself to do that to someone who has recently obtained his Ph.D. with a SIGGRAPH paper. So instead I talked with Ciao a bunch of high-level research questions. We had a great time.

The troubles came after I filled out the interview evaluation. The hiring manager informed me that my interview style is “not very proper” and sent me to a course teaching people how to do proper interviews. (I confess I never attended the course.) Furthermore, the interview with Ciao turned out to be not only the first but also the last one that I ever conducted for that company.

Fortunately, my “not very proper” interview with Ciao did not cost his job offer, and later he joined the company. Together we had some additional fun for a couple of more years. It soon became pretty apparent that we are both not very good fit for that company (my “not very proper” interview with him is probably a good early sign), so eventually we both left. But I would like to thank that company for enabling me to learn a few very important lessons that I wouldn’t have otherwise, and most importantly, the chance for getting to know Ciao.

2009-07-10

Dream tapping

Filed under: Real — liyiwei @ 10:31 am
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Waking up early in the wee hours is usually not a good thing, as it could cause fatigue and all other problems.

However, one good side effect for waking up early in that it allows us to tap into our dreams. It is known that brains do not stop activities during our sleeps, but we usually do not remember what have happened.

I have found that sleep interruptions, especially these happen in the early mornings, help me recall my dreams. I do not know about other people, but my brain tends to produce a lot of strange and interesting stuff (e.g. color movies) during my sleep. And judging by the frequency I came up with ideas after waking up, I know in addition to playing weird my brain also did some serious work.

The most interesting thing I have observed is that most my dream thoughts are less rational than my day thoughts, and many ideas that appear to be plausible during my dreams become apparently ridiculous after I wake up. But sometimes I got really useful ideas. For example, some of my SIGGRAPH paper ideas, as well as the previous two posts (I woke up at 3 am this morning), are produced during my sleep.

Maybe I should intentionally disrupt my sleep when I am short on research ideas.

The free price for search

Filed under: Real — liyiwei @ 10:29 am
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Many people, including myself, observe that Bing produces better search results than Google. But this does not mean that people will switch. Techcrunch has a recent article on this subject. There are various potential reasons behind this unwillingness to switch, such as brand loyalty or the improvement of Bing over Google is not enough.

I wonder if the fact that search is free also plays a role here. In his book Predictably Irrational, Dan Ariely has shown that giving something for free could distort peoples incentives and judgments, making them abandon their usual (more rational) thinking for non-free products. So under the hypothetical situation that people will have to pay to use search engines (either a flat rate or a usage charge or a combination), will this make them more likely to switch to a better product?

Of course, as long as Google stay pat and not charging for the use of its search engine, this may never be an issue. But we never know; Google already started to charge for some of its previously free products.

2009-06-04

Mysterious phone calls

Filed under: Real — liyiwei @ 5:12 pm
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I almost never pick up phones, especially calls from unknown sources. But for 3 consecutive days I got missed calls from the same number. The persistence of the caller impressed me, so I looked up the number online; it is registered under a “debt collection, judgment recovery, and private investigation” company.

To my memory, I have never hired a private detective, never borrowed from loan sharks, have no mistress, and have not gotten into a fight since high school, so I became really curious on why kind of business they have for me. So I called them back. After scrambling through their files, they told me they are trying to collect debt from someone else who once owned my current phone number.

When I come home and find a black jacketed guy waiting in my living room, I wonder if he would prefer tea or coffee.

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