Monthly Archives: January 2009

足球員 > 足球評述員

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The function of a mathematician is to do something, to prove new theorems, to add to mathematics, and not to talk about what he or other mathematicians have done.

Exposition, criticism, appreciation, is work for second-rate minds.

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If then I find myself writing, not mathematics, but ‘about’ mathematics, it is a confession of weakness, for which I may rightly be scorned or pitied by younger and more vigorous mathematicians.

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— A Mathematician’s Apology (1940), by G. H. Hardy

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2009.01.28 Wednesday ACHK

國家

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Nation, Country, and State

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In casual usage, the terms “country,” “nation,” and “state” are often used as if they were synonymous; but in a more strict usage they can be distinguished:

* Country denotes a geographical area.

* Nation denotes a people who are believed to or deemed to share common customs, origins, and history.

However, the adjectives national and international also refer to matters pertaining to what are strictly states, as in national capital, international law.

* State refers to the set of governing and supportive institutions that have sovereignty over a definite territory and population.

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— Wikipedia

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Country 地理國家

Nation 民族國家

State 政權國家

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— Me, Translated

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2009.01.27 Tuesday ACHK

Fear | Hope

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Fear cannot be without hope nor hope without fear.

— Spinoza

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Do what you fear is an effective way to get what you want.

— Me

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Do what you fear is a way to upgrade yourself in a short time.

Do what you fear is a way to update yourself in a short time.

— Me

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2009.01.26 Monday copyright ACHK

傷逝 3

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In the memory of my 1984 Dog

珍惜眼前人 珍惜眼前狗

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Every parting gives a foretaste of death, every reunion a hint of the resurrection.

— Arthur Schopenhauer

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生離反映死別, 重聚預告重生.

— Me, Translated

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2009.01.23 Friday copyright ACHK

Gift

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Gaining a humorous perspective requires self-awareness, the ability to see the irony and paradox in things and to reassert what is truly important.

True humor also draws on conscience so that it is genuinely uplifting and doesn’t fall into the counterfeit of cynicism or putting people down.

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Humor is also the humanizer and equalizer in relationships.

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— p.33, 34, The 7 Habits of Highly Effective Families, Stephen Covey

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.2009.01.22 Thursday ACHK

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

River

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A wise person’s knowledge is

like river that never runs dry,

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like an ever-flowing stream

of good advice.

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— by ???

— Collected by me, 2001.04.11

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2009.01.09 Friday ACHK