Confessions of a researchaholic

November 19, 2017

EE bonds versus I bonds

Filed under: Real — liyiwei @ 5:36 pm

The individual savings bonds (I and EE) offered by the US treasury can be a good (conservative) subset of an investment portfolio, but some basic calculation can help decide whether and how to invest.

The current (fixed) rate of the EE-bonds is 0.1 percent, which, if compounds for 20 years, will increase the original face value by only 2 percent!
The treasury will guarantee to double the face value at the 20 year anniversary. This translates to about 3.53 percent increase per annum, which is not too bad given the current low rate environment. But we have to wait for 20 years and trust the treasury not to mess with the rates or the policies. A lot of things can happen in just 3 years, not to mention 20 (e.g. inflation).

I-bonds offer higher rates (around 2.5 percent recently) which are adjusted for inflation (unlike the EE bond rates which remain fixed). Their values are not guaranteed to at least double after 20 years, but they have a much lower opportunity cost than EE bonds without betting on interest rates or treasury policies.

November 10, 2017

Investigate before implement

Filed under: Real — liyiwei @ 9:18 am

I spent a few days hacking some stuff only to find out a better solution which took me only 5 minutes.

I was too focused in finishing the task, so I followed the first idea that came to my mind without spending enough time investigating different options.

November 2, 2017


Filed under: Real — liyiwei @ 9:43 am

When it comes to chocolate, I prefer something as pure and dark as possible.
My sources depend on the geographic availability, usually large baking chocolate blocks (e.g. Callebaut) while in the US, and Latio while in Hong Kong.
When I need to tune down the degree of sweetness, I also mix up with 100 percent cocoa, e.g. Ghirardelli baking bar.

October 29, 2017


Filed under: Imaginary,Real — liyiwei @ 11:16 am

VR space warp is interesting and challenging enough, but VR time warp appears even more so.
At least I have no idea how to achieve that for the next SIGGRAPH project.

October 25, 2017

Voucher code

Filed under: Real — liyiwei @ 5:12 pm

October 15, 2017

Stand a chance

Filed under: Real — liyiwei @ 1:20 pm

Someone asked me whether he/she stands a chance to apply for a position.

Just go ahead and do it. I never care whether I stand a chance or not. The only thing I know for sure is that the chance is zero if I do not even try.

October 7, 2017

Dream catcher

Filed under: Real — liyiwei @ 9:23 am
Tags: ,

Waking up in the middle of the night, sometimes I can remember ideas from my dreams.

October 3, 2017


Filed under: Real — liyiwei @ 9:32 am
Tags: ,

water color by my dad

September 17, 2017

Devil in the house

Filed under: Imaginary,Real — liyiwei @ 2:39 pm
Tags: ,

You brought a devil into the house
It wants to leave
And takes your flesh

So just let it go

Teach yourself and your offspring well
So that none would not be fooled by the devil

Exercise your discipline
To await the devil to destroy itself

If you want to lure it back
Better yourself is the only way

September 8, 2017

Expresii appy hour

Filed under: Real — liyiwei @ 5:03 pm

My friend Nelson Chu could not attend SIGGRAPH 2017 to demo his Expresii, so I stood in for him.

Thanks to the wonderful product from Nelson, this is a fantastic presentation experience. I can interact with and talk to many different people, focusing more on practical utility than technical details. I had no time to get bored for the entire 2-hour duration. People kept on visiting even after the session closing. And I had a great time practicing playing the app myself.

Publishing a SIGGRAPH paper is about proving how smart we are, while demoing a SIGGRAPH app is about demonstrating how useful it is for you.

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