Wind wave

In fluid dynamics, wind waves, or wind-generated waves, are surface waves that occur on the free surface of oceans, seas, lakes, rivers, and canals or even on small puddles and ponds. They result from the wind blowing over an area of fluid surface. Waves in the oceans can travel thousands of miles before reaching land. Wind waves range in size from small ripples, to waves over 100 ft (30 m) high.

When directly generated and affected by local winds, a wind wave system is called a wind sea. After the wind ceases to blow, wind waves are called swells. More generally, a swell consists of wind-generated waves that are not significantly affected by the local wind at that time. They have been generated elsewhere or some time ago. Wind waves in the ocean are called ocean surface waves.

Wind waves have a certain amount of randomness: subsequent waves differ in height, duration, and shape with limited predictability. They can be described as a stochastic process, in combination with the physics governing their generation, growth, propagation and decay—as well as governing the interdependence between flow quantities such as: the water surface movements, flow velocities and water pressure. The key statistics of wind waves (both seas and swells) in evolving sea states can be predicted with wind wave models.

Cốm

Cốm, or green rice, is a dish in Vietnamese cuisine. It is not dyed green, as can be done with pandan, but is immature rice kernels roasted over very low heat then pounded in a mortar and pestle until flattened. Cốm is seasonal dish associated with autumn. It can be eaten plain or with coconut. The taste is slightly sweet with a nutty flavor.

A traditional pastry, bánh cốm (green rice cake) is made using cốm with mung bean filling. Cốm is often offered to worship the ancestors in the Mid Autumn Festival. The green rice can also be used in sweet soup, chè cốm. Cốm is similar to flat green rice of the Khmer people.

References

CM

CM or its variants may refer to:

Computing

Entertainment

Guqin

The guqin (simplified/traditional: 古琴; pinyin: gǔqín; Wade–Giles ku-ch'in; pronounced [kùtɕʰǐn]; literally "ancient stringed instrument") is a plucked seven-string Chinese musical instrument of the zither family. It has been played since ancient times, and has traditionally been favoured by scholars and literati as an instrument of great subtlety and refinement, as highlighted by the quote "a gentleman does not part with his qin or se without good reason," as well as being associated with the ancient Chinese philosopher Confucius. It is sometimes referred to by the Chinese as "the father of Chinese music" or "the instrument of the sages". The guqin is not to be confused with the guzheng, another Chinese long zither also without frets, but with moveable bridges under each string.

Traditionally, the instrument was simply referred to as qin (Wade–Giles ch'in) but by the twentieth century the term had come to be applied to many other musical instruments as well: the yangqin hammered dulcimer, the huqin family of bowed string instruments, and the Western piano are examples of this usage. The prefix "gu-" (meaning "ancient") was later added for clarification. Thus, the instrument is called "guqin" today. It can also be called qixianqin (lit. "seven-stringed instrument"). Because Robert Hans van Gulik's famous book about the qin is called The Lore of the Chinese Lute, the guqin is sometimes inaccurately called a lute. Other incorrect classifications, mainly from music compact discs, include "harp" or "table-harp".