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Sleep Pottery Demographics of India
 
 
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Potters near Bago, Myanmar
Pottery Square, Bhaktapur, Nepal
Pottery Square, Bhaktapur, Nepal
Kathmandu
Ban Chan Pottery village Luang Prabang Laos
Potters near Bago, Myanmar
Pottery
200412N1117
Pottery
Bhaktapur
Pottery
Tree Pottery
cheval et palefrenier détail
chameau barbare 2
200312N2831
Pottery seller - Chanderi
Hala Pottery, Pakistan.
Morocco
hala pottery 3
NJ - USA
Marajoara Pottery
fab cer lavoro v
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Pottery

Pottery is the ceramic material which makes up potterywares, of which major types include earthenware, stoneware and porcelain. The place where such wares are made is also called a pottery (plural "potteries"). Pottery also refers to the art or craft of the potter or the manufacture of pottery.

The definition of pottery used by ASTM is "all fired ceramic wares that contain clay when formed, except technical, structural, and refractory products." Some archaeologists use a different understanding of this definition by excluding ceramic objects such as figurines which are made by similar processes, materials and the same people but are not vessels.

Pottery is made by forming a clay body into objects of a required shape and heating them to high temperatures in a kiln which removes all the water from the clay, which induces reactions that lead to permanent changes including increasing their strength and hardening and setting their shape. A clay body can be decorated before or after firing. Prior to some shaping processes, clay must be prepared. Kneading helps to ensure an even moisture content throughout the body. Air trapped within the clay body needs to be removed. This is called de-airing and can be accomplished by a machine called a vacuum pug or manually by wedging. Wedging can also help produce an even moisture content. Once a clay body has been kneaded and de-aired or wedged, it is shaped by a variety of techniques. After shaping it is dried and then fired.

TEXT FROM WIKIPEDIA, cba SOME RIGHTS RESERVED.
Sleep

Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma. Sleep is a heightened anabolic state, accentuating the growth and rejuvenation of the immune, nervous, skeletal and muscular systems. It is observed in all mammals, all birds, and many reptiles, amphibians, and fish.

The purposes and mechanisms of sleep are only partially clear and are the subject of substantial research. Sleep is often thought to help conserve energy, but decreases metabolism only about 5–10%. Hibernating animals need to sleep despite the hypometabolism seen in hibernation, and must return from hypothermia to euthermia in order to sleep, making sleeping "energetically expensive."

In mammals and birds, sleep is divided into two broad types: rapid eye movement (REM) and non-rapid eye movement (NREM or non-REM) sleep. Each type has a distinct set of associated physiological and neurological features. The American Academy of Sleep Medicine (AASM) further divides NREM into three stages: N1, N2, and N3, the last of which is also called delta sleep or slow-wave sleep.

TEXT FROM WIKIPEDIA, cba SOME RIGHTS RESERVED.
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