Lifelike Drawing in Colored Pencil with Lee Hammond (2)

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    Primary Colors: Red, Yellow, and Blue. They are pure colors. The secondary color is made by mixing two primary colors and can be found in between the two primary colors in the color wheel. ...
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    1 cast shadow: darkest part where no light can reach (underneath the sphere) 2 shadow edge 3 Halftone area: true color neither affected by the strong light nor shadows 4 reflected light: the l...

lectures on fourier series (2)

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    The problems are genuine, and if you solve them, plot them, and look at them, you will have gained an understanding of a number of physical processes and, at the same time, you will have had an apprec... (2回应)
  • 第1页
    As an example, let us take a clock which stopped some years ago at 5.00pm and still displays 5.00. Does this clock give a more accurate representation of time than another one which is always, consist...

钢琴弹奏的基本法则 (2)

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    要弹得慢,需要一种意志的力量去控制。弹奏者很容易被一种快奏的奢望所袭,而不能自持。... 结果弹者和听者都因预感到错误百出而透不过气来。弹奏者奏得模糊不清,异常拙劣,还有其他错误。这样是不会产生艺术上..
  • 第12页
    很重要的练音阶方法:

What Do You Care What Other People Think? (5)

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    There are the rushing waves mountains of molecules each stupidly minding its own business trillions apart yet forming white surf in unison. Ages on ages before any eyes could see ...
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    The first way in which science is of value is familiar to everyone. It is that scientific knowledge enables us to do all kinds of things and to make all kinds of things. ... To every man is gi...
  • 第111页
    In the air force we have a rule: check six. A guy is flying along, looking in all directions, and feeling very safe. Another guy flies up behind him (at ‘six o'clock’ — ‘twelve o'clock’ is dire...
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    When I finally saw Arlene, she was very weak, and a bit fogged out. She didn't seem to know what was happening. She stared straight ahead most of the time, looking around a little bit from time to tim...
  • 第139页
    The magic of a movie... is exactly as what Feynman wrote: At the museum there was a special theater with a movie about NASA and its achievements. The movie was wonderful. I had not fully appreciate...

clouds in a glass of beer (2)

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    An interesting fact about the saturation vapor pressure I read: The saturation vapor pressure is a function only depending on temperature (it varies with the molecule properties of course but they ...
  • 第8页
    这篇引子很有趣。 ... "The fisherman and the Jinni", one of the tales from the Arabian Nights. When the fisherman in this tale uncorked the jar, its contents expanded rapidly into the surro...
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