For process engineering, several things are important: increasing the surface area of the solid; making the solid have wanted grain size; and pulping the material to the desired state (squishing it).
Windmill
A windmill is a type of working engine. It converts the wind's energy into rotational energy. To do this it uses vanes called sails or blades.
The energy made by windmills can be used in many ways. These include grinding grain or spices, pumping water and sawing wood. Modern wind power machines are used to create electricity. These are called wind turbines by engineers or wind mills by the average person. Before modern times, windmills were most commonly used to grind grain into flour for making bread. The windmill has been in history for many years.
An organ powered by a "windwheel" was written about in the 2nd century AD by the Greek engineer Hero. It could have been the first machine in history that used wind power. Vertical axle windmills were used in eastern Persia (Sistar) by 60 AD. Horizontal axle windmills were invented in Northwestern Europe in the 1180s. This is the type often used today.
The first windmills had long vertical shafts with rectangle shaped blades. They existed in Persia in the 9th century. There is a story about a windmill and the second caliph Umar (634\644 AD). It is not known if this is a true story. These windmills were made of six to twelve sails. The sails were covered in reed matting or cloth. They were very different from European versions. A similar type of vertical shaft windmill with rectangle blades can also be found in 13th century China. They were used for irrigation.
The blades or sails of the windmill are turned by the wind. Gears and cogs makes the drive shaft inside the windmill turn. In a windmill used for making flour, this turns the grinding stones. As the stones turn, they crush the wheat (or other grain) between them. In a windmill used for pumping water, turning the drive shaft moves a piston. The piston can suck up and push out water as it moves up and down. In a windmill used for generating power, the drive shaft is connected to many gears. This increases the speed and is used to turn a generator to make electricity
Miguel de Cervantes' book "Don Quixote de La Mancha" has an important scene in which Don Quixote attacks windmills. He thinks that they are violent giants. Because of this, La Mancha and its windmills are famous. This is also the origin of the phrase "tilting at windmills". It means an act of uselessness. "Moulin Rouge" translated directly from French, and means "Red Windmill".
Windmill (disambiguation)
A windmill is an engine powered by the wind to produce energy, often contained in a large building as in traditional post mills, smock mills and tower mills.
Windmill may also refer to:
Blood transfusion
Blood transfusion is a medical term. It means a procedure used to transfer blood (or some products based on blood) from the circulatory system of one human to that of another human.
Blood transfusions can save the life of a person, if that person has lost a lot of blood. A person can lose blood from an injury, a trauma or from a medical operation. Blood transfusions can also be applied as a treatment to certain diseases of the blood (like Anaemia, for example).
Blood is not collected and used immediately. Instead it is kept until it is needed. The storage area is informally called a blood bank . By adding anti-coagulant to keep the blood from clotting and refrigerating the blood, it is possible to store it for a few days. Information about transfusion and donation is available at the National Institutes of Health website .
Not all people are able to donate blood to all other people. Testing for blood types usually prevents any bad reaction to a blood transfusion. However, there are special problems for anyone with rare blood groups. It is very important, in order to avoid any complications during a blood transfusion, to detect individuals with rare blood types. The usual tests for ABO blood group system would show them as group O. It may not be possible to give a blood transfusion at all unless the repository has supply of blood which will not cause a reaction.it donates blood
Delirium
Delirium is a medical term. The condition is also known as acute confusional state. Doctors use it to describe patients who have lost parts or all of their ability to focus attention. People who suffer from it may also have problems to concentrate, or to remember things or other people. Delirium is a medical symptom. It is not a disease.
A delirium can have many causes. The most common ones include:
There are several definitions of what constitutes a delirium, but in general, the following is true:
Deliria are often treated with special drugs, called antipsychotics.
Deliria are always a medical emergency, because it is impossible to predict how they develop. Worst-case scenarios include cardiac arrest, and malfunctions of the metabolism. In order to be able to treat a delirium, its cause must usually be found. In the case of alcoholism, the most common cause for a delirium is the withdrawal of alcohol. This condition is known as Delirium tremens.
Jaundice
Jaundice (also called icterus) is when the skin and the whites of the eyes become a yellow color. People with jaundice have a problem with their liver, which stops it from removing heme properly. Heme (from hemoglobin) changes to a chemical called bilirubin after red blood cell death. Bilirubin causes the yellow coloring of the skin. Jaundice is common in newly born babies. It usually starts the second day after birth.
Jaundice can also be caused by other diseases, like malaria, hepatitis, or gallstones.
Jaundice is the most common of all liver problems. The yellow colour of the skin and mucous membranes happens because of an increase in the bile pigment, bilirubin, in the blood.
The bile, made by the liver, is a vital digestive fluid needed for proper nutrition. It also stops decaying changes in food. If the bile is stopped from entering the intestines there is an increase in gases and other products. Normally, the production of bile and its flow is constant.
There are three types of jaundice:
Yellow discoloration of the skin and the whites of the eyes happens in all types of jaundice.
The symptoms of jaundice are:
Jaundice is a sign that the liver is not working. It may be caused by a blockage of the bile ducts which release bile salts and pigment into the intestines. The bile then gets mixed with blood and this gives a yellow colour to the skin. The blockage of the bile ducts could be caused by:
Other causes of jaundice are pernicious anaemia and diseases affecting the liver such as typhoid, malaria, yellow fever and tuberculosis.
Hildegard of Bingen
Hildegard of Bingen (born Bemersheim nr. Alzey 1098; died 17 September 1179) was a German writer, composer and mystic. She was an abbess who is well known for her literary works and her songs. She also wrote about medical and scientific things, and wrote letters to many important politicians.
Hildegard was born into a noble family. Her parents sent her to a monastery because she was the tenth child of the family. She took the veil (became a nun) at the age of 15. By the time she was 38 she had the title of “mother superior”. She founded (started) a monastery on the Rupertsberg in the Rhine valley near Bingen. Later she founded a daughter house on the other side of the river near Rüdesheim. She travelled a lot and talked to many important people. She later had the title of “abbess”. After she died several popes suggested she should be made a saint, but this never happened. She does, though, have a feast day on September 17, which is celebrated in some parts of Germany.