Vertigo

04Mar09

1) lost souls cafe
2) stairwell in new astro building


Phone skin

25Feb09

My wordpress cred has doubled since mdawaffe got me a cool wp skin for my phone.



Christmas pics

01Jan09

Light bulbs

02Dec08

The Huntington has a cool new history of science exhibit. One of the displays consists of about a hundred historical light bulbs, including three test bulbs labeled by Edison himself. They constructed a case filled with Nitrogen (in case the seals on the bulbs were broken) and put a few watts through some of the old bulbs. It’s interesting that Edison’s and many others’ bulbs were designed to maximize the length of filament that was inside the bulb, by looping the filament up and down in a circle. Modern day light bulbs are made with very thin filaments in tightly packed coils. That would seem to concentrate the heat, leading to faster sublimation and weakening of the tungsten. So my question to the blogosphere is, why doesn’t this happen, or why is the modern design better?

Historical light bulbs on display at the Huntington Library

Historical light bulbs on display at the Huntington Library


I finished my wordpress plugin, and, after fixing a few bugs, I think it’s at a usable version. Here is the plugin page, including source code and theory. The basic gist is that it creates a sidebar in your blog with links to some of your posts. At first, it experiments by displaying random posts, then it analyzes the resulting data using a bayesian learning algorithm to determine which post titles are most likely to get clicked. Why am I not using it on my own blog? I’m hosted at wordpress.com which doesn’t let you add your own plugins. Also, there’s nothing of general interest on my blog.


Throne

02Dec08

I’ve been combing craigslist for a throne to complete my office. Today was the day of anointing.
Continue reading ‘Throne’


Finally managed to put the finishing touches on Relaxed uncertainty relations and information processing and get it out.

The result I find most interesting is about “learnability” of states. Although quantum states seem very complicated, requiring 2^n complex coefficients to describe a state of n qubits, Aaronson showed that actually quantum states are easy to learn, that is only it takes on the order of n measurements to figure out approximately what state you have. We show that if you allow more general states with the strongest nonlocal correlations allowed that don’t violate no-signaling, then it’s hard to learn states. That is, it will take exponentially many measurements to learn the approximate identity of a state. Another way in which quantum mechanics is powerful, but not too powerful.


Random update

15Nov08

 I finally overcame a tremendous bout of poison oak (not pictured, it was disturbing even to look at) and ventured back into the wild (pictured). I’ve also been working on my research web site (coming soon), a wordpress plugin that uses stat. learning theory (coming soon), and an arxiv paper (coming soonest).


Fruit

09Oct08

What is this mysterious fruit in our yard? It’s like a miniature green banana. I guess I’ll never know what it really is.



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