Category Archives: Physicist

Semester

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PHY4211 Electromagnetic Theory and Optics

電磁理論與光學

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PHY4450 Solid State Physics

固熊物理

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PHY5410 Quantum Mechanics II

量子力學(二)

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2009.01.13 Tuesday copyright ACHK

Murphy’s law

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“If anything can go wrong, it will. ”

“If there’s more than one possible outcome of a job or task,
and one of those outcomes will result in disaster or an undesirable consequence, then somebody will do it that way. ”

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Regardless of the exact composition and origin of the phrase,
its spirit embodies the principle of defensive design
— anticipating the mistakes the end-user is likely to make.

For example, the 3.5-inch floppy disk once used in many personal computers will not easily fit into the drive unless it is oriented correctly.

In contrast, the older 5.25-inch floppy disk could be inserted in a variety of orientations that might damage the disk or drive.

The newer CD-ROM and DVD technologies permit one incorrect orientation: the disc may be inserted upside-down, which is harmless to the disc.

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A defensive designer knows that if it is possible for the disc to be inserted the wrong way, someone will eventually try it.

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— Wikipedia, edited by Me

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2009.01.11 Sunday ACHK

Teach Yourself Programming in Ten Years

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Researchers have shown it takes about ten years to develop expertise in any of a wide variety of areas, including chess playing, music composition, telegraph operation, painting, piano playing, swimming, tennis, and research in neuropsychology and topology.

The key is deliberative practice: not just doing it again and again, but challenging yourself with a task that is just beyond your current ability, trying it, analyzing your performance while and after doing it, and correcting any mistakes. Then repeat. And repeat again.

There appear to be no real shortcuts: even Mozart, who was a musical prodigy at age 4, took 13 more years before he began to produce world-class music.

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— Teach Yourself Programming in Ten Years, Peter Norvig

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2009.01.10 Saturday ACHK

統計力學(結局篇)

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正常結果:

統計力學(輕量級)    A

統計力學(重量級)    B-

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目標結果:

統計力學(輕量級)    A

統計力學(重量級)    A

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結果結果:

統計力學(輕量級)    A-

統計力學(重量級)    B

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節哀順變吧!

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2009.01.07 Wednesday copyright ACHK

天與地

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星期一,

早上9:30 – 11:15 一堂,

下午4:30 – 6:15 一堂.

中間的時間不知如何自處.

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原來notebook 充滿電也只能用三小時.

原來中大圖書館的書桌下, 都有電源供應.

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2009.01.05 Monday copyright ACHK

Physics and Love 1

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Tell your son to stop trying to fill your head with science — for to fill your heart with love is enough.

Dear Mrs. Chown,

Ignore your son’s attempts to teach you physics.
Physics isn’t the most important thing.
Love is.

Best wishes,
Richard Feynman

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2008.12.31 Wednesday ACHK

Beauty 2

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To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature … If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.

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— The Character of Physical Law (1965) Ch. 2, by Richard Feynman

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2008.12.31 Wednesday ACHK

Professor

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But now that we’ve come this far, being a professor (which means having the habit of not being able to stop talking at the right time), I cannot resist telling you something about the rest of physics.

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— p.130 Feynman’s QED: the strange theory of light and matter

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2008.12.26 Friday ACHK