[spam] Re: Biased Random Walk Method and E Coli

It seems that I must practice more to improve my expression^^
Richard Kennaway’s explaination(“a school of fish” & “insect”) is exactly what i meaned. I put a video clip of my simulated “cricket”(six-legged insect) on CSGnet last year.
However, I shouldn’t use “convex” here. The word “convex” is used in that 3D rendering engine(OGRE 3D) to represent a special type of shape for short. This shape can be created by its vertices(vertexes). If you have seen the screenshot attached, the white object among those green balls is a kind of convex shape.
It’s my pleasure to talk about my experience on PCT and reorganization. The programme is a Windows application and requires a certain driver’s support(a physics simulation engine called PhysX). Most PCs are able to run it.
Best, (It’s the same meaning with yours^
^)
Bo
Bill Powers powers_w@FRONTIER.NET Wrote£º

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[From Bill Powers (2007.02.02.0645 MST)]

Bo Wang (2007.02.01) –

This is a quote from a paper named “ROBUST VARIANCE REDUCTION FOR
RANDOM WALK METHODS”: Random walk methods are effective for solving
linear partial differential equations in many dimensions, especially
those involving complex geometries.

It’s just what e coli is doing.

Thanks, Bo, that is useful information. I’ll be very interested to
hear more. Will your program run on a PC? If so, I hope you will
demonstrate it and give a talk about it at the CSG meeting in July. I
will bring my laptop and there will be a projection device to use
with a large screen. I think there will also be high-speed internet
connections available.

Your English is more than good, it is excellent – but once in a
while you seem to be using a word with a meaning I can’t guess. I
can’t
really complain, since my Chinese is a total failure, but
perhaps you will enlighten me about what you mean by “cricket” and
“convex” in the following:

I built a new programme these days with my “Physics lab”(The
platform I showed my cricket). Some green balls evolve to chase a white convex.

"Cricket"is the name of a British ball game. It may also be a
communication device (???). And “convex” is an adjective referring to
a shape like the outside surface of a ball (“concave,” the opposite
of convex, would indicate the shape of the inside surface of a bowl).

Also, “shoal”:

The whole looks like a shoal chasing crumbs.

The word “shoal” means a place in a lake or ocean where the bottom
rises close to the surface. It is related to “shallow.” I wonder if
you might mean a “school” (of fish), pronounced "skool’. In this
expression, “school” is used poetically to mean a “group” like a
group of school
children running around together.

PCT is truly becominbg an international science.

Best, (which is an abbreviation of “I send my best regards to you”),

Bill Powers

P.S. If I’m telling you things you already know, just smile and say “I know.”



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I’m not in Singapore and I have never been there before. I have no idea why you say so.
Random Walk Method has at least two branches. One is studying the random walk and diffusion, something like Brownian Motion. MIT open course ware has such materials: http://ocw.mit.edu/OcwWeb/Mathematics/18-366Spring-2005/LectureNotes/index.htm
Those math methods used in it are worth to read
Another is studying searching techniques(Fixing appropriate weights for a control system is a kind of searching)
http://bionum.cs.uiuc.edu/ the bionumerics research group is studying computational methods for biomolecular simulation(seems far way from PCT).
Its collaboration theoretical and computational biophysics group studies the bacterial flagellum. Random walk method is also what they concern
Best,
Bo
Bill Powers powers_w@FRONTIER.NET Wrote:

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[From Bill Powers (2007.02.02.0735 MST)]

Richard Kennaway (2007.02.02.1421 GMT) –

In British English, a shoal of fish is the same thing as a school of
fish, and a cricket is also a six-legged insect. But “convex” is
still only an adjective.

And of course British English would prevail in Singapore where Bo Wang is.
Thank you. Now I understand why “school” is used – my theory about
“school children” is obviously just a bad guess. And I see I missed
an interpretation of Bo’s “The platform I showed my cricket.” Change
that to “with which I showed my cricket” and the insect meaning jumps
right up and bites me.

It’s good to have another programmer in the group, isn’t it?

Best.

Bill P.



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Bill Powers powers_w@FRONTIER.NET Wrote£º

Because my memory is the size of a cricket. I think what I meant to
say was Shanghai. If that’s not right I shall have to stop guessing and ask.

That’s right :slight_smile:

Best,

Bo

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