Streamline, Streakline, and Pathline

From Wiki =)
Funny picture
Time dependent field is a key!

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Trace and pressure tensor

Since the trace of any tensor is independent of any coordinate system, the most complete coordinate-free decomposition of a symmetric tensor is to represent it as the sum of a constant tensor and a traceless symmetric tensor. (Symon (1971) Ch. 10) Thus:

where δij is the Kronecker delta. The first term on the right is the constant tensor, also known [...]

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Working directory

import os
print os.getcwd()

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Data visualization tool

A quick look at six open source graphics utilities
M. Tim Jones (mtj@mtjones.com), Senior Principal Software Engineer, Emulex Corp.
http://www.ibm.com/developerworks/linux/library/l-datavistools/
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This is a good document in that the author explains, compares, and recommend data visualization tools.

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Fourier series theorem

Fourier Series theorem is relevant to Ballooning representation.
Theorem 21.2 (Fourier Series Theorem)
.

Let  be a function which is piecewise continuous on  .Its Fourier series is given by

at each point  where the one sided derivatives  and  both exist.
2. If  is continuous the result is

Excerpt from http://www.math.ohio-state.edu/~gerlach/math/BVtypset/node27.html#Fourier_series_theorem
Ref. A. Thyagaraja, J. Plasma Physics 59, 367 (1998)

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Cygwin Setting only for X11

Following module should be installed :
X11>xorg-server (required, the Cygwin/X X Server)
X11>xinit (required, scripts for starting the X server: xinit, startx, startwin.sh, startxwin.bat (and a shortcut on the Start Menu to run it), startxdmcp.bat )
NET> openssh

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Method of characteristics (from wiki)

For a first-order PDE, the method of characteristics discovers curves (called characteristic curves or just characteristics) along which the PDE becomes an ordinary differential equation (ODE). Once the ODE is found, it can be solved along the characteristic curves and transformed into a solution for the original PDE.
For the sake of motivation, we confine our [...]

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My favorite songs

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싸이월드에 대한 단상

모든 홈페이지나 블로그 등이 여러 역할이 있겠지만, 무엇인가를 누군가에게 보여주는 역할이 강하다는 것에 대해서는 부인할 수 없을 것이다. (물론, 이 블로그는 자료의 저장과 내 기억을 위해서 만들어지긴 했다만 이 글은 누군가를 위해서 쓰는지도 모르겠다.) 자신을 다른 사람에게 알리고 싶은 욕구에 대한 표출일 수 있겠다. 달리 말하면 사랑받고자 하는 욕망인가.
싸이월드를 했었고, 그리고 마지막으로 탈퇴를 하면서 느낀 [...]

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2007 Student in PPPL

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