People who have hallucinations are not necessarily ill, lack of sleep can also cause hallucinations. Hallucinations just before going to sleep or just after waking up are considered normal.
Hallucinations can affect all of a person's senses. People with the mental illness of schizophrenia may hear sounds or voices that are not really there. People with certain mental illnesses may also have hallucinations in which they see a person or thing which is not really there. People are less likely to have hallucinations in which they smell or touch something that is not really there. Certain forms of epilepsy can cause hallucinations. Finally, hallucinations can be the result of certain substances taken or of certain physical constellations. Most of the time, these substances are taken to get the hallucinations. Sometimes, (severe) lack of sleep, or high fever can lead to hallucinations brought on by such viruses as the common cold.
Many studies have shown hallucinatory experiences take place across the world. Several studies, one of them done as early as 1894, have reported that approximately 10% of the population experience hallucinations. A recent survey of over 13,000 people reported a much higher figure. According to the study, almost 39% of the people reported hallucinatory experiences. 27% of the people reported daytime hallucinations, mostly outside the context of illness or drug use. From this survey, hallucinations affecting smell or taste seem the most common in the general population.
Some diseases such as brain disorders or infections may cause a person to have hallucinations. As well, an alcoholic (person who is addicted to alcohol) who stops drinking alcohol suddenly may experience a type of hallucinations called delirium tremens (or "DT's"). Some people have hallucinations if they do not sleep for a number of days, or if they do not eat for a number of days.
Some people have hallucinations because they purposefully or accidentally put chemicals or drugs into their bodies.
Some people use illegal drugs that cause vivid hallucinations, such as LSD ("acid") and PCP ("angel dust"). Many kinds of drugs - even legal ones - will cause hallucinations, if very large doses are taken, and it is seen as a side effect.
Some legal drugs that dentists, doctors, or surgeons use cause hallucinations. The dentists, doctors, and surgeons use drugs called anaesthetics to make people not feel pain, or to make people become unconscious. But the drugs also have some other additional effects, which are called side effects, such as nausea (feeling sick) and hallucinations.
Many dentists use an anaesthetic called nitrous oxide ("laughing gas"). Inhaling large quantities of nitrous oxide can cause people to have hallucinations. Doctors and surgeons use many types of anaesthetic gases so that patients who are being operated become unconscious. When a person inhales anaesthetic gases, they may have hallucinations for several minutes, until they become unconscious.
Some adults accidentally swallow a poisonous chemical because it is in a bottle that has the wrong label. In some cases, children swallow a poisonous chemical because they think that it is a food product or a drink. Some dangerous, poisonous chemicals which can make people very sick or even kill them also cause hallucinations.
Some people have hallucinations when they have not slept for a long time; other people have something resembling a hallucination before falling asleep. This is usually called hypnagogia. Most of the time, the people experiencing this kind of hallucinations are aware of the fact that they are not real.
Shadow
A shadow is a dark area on a bright surface. It is caused by something blocking a source of light. A shadow's outline, called a silhouette, will have the same shape as the object blocking the light.
Depending on the light source, or sources, a wide range of effects can be produced. A point source of light casts only a simple shadow, called an "umbra". A "penumbra" is the region in which only a portion of the light source may be blocked. If there is more than one light source, there will be several shadows, with the overlapping parts darker, and various combinations of brightness or even colors. The more diffuse the lighting is, the softer and more indistinct the shadow outlines become, until they disappear. The lighting of an overcast sky produces few visible shadows,
Astronomical shadows are usually sharp. This is because in space the light usually does not go through an atmosphere.
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The Sims
The Sims is a video game released in 2000 . It is a life simulator that imitates real life. Sims can get jobs, have needs, and can get married. It was the third best selling computer and video game of all time (it mostly sold well on the computer).
The Sims was so successful it has created three sequels, (The Sims 2 in 2004, The Sims 3 in 2009, and The Sims 4 in 2014) along with many other spin-offs of the series.
The Sims was created by Will Wright, who worked at Maxis, which was owned by EA Games. It was first released in February 2000. His intention was to make an open-ended game without a set objective. This feature was the reason why it attracted so many gamers.
The first part of the game is to make a family, or play one of the preexisting families. Every family can have children and adults. A player can choose what they look like from many different clothes and hair styles. Each family must include at least one adult.
Each family starts with $20,000, regardless of how many sims are in the family. After the family is made, the player can move them into a lot. Some lots are empty while other lots have houses on them.
There are many different floor coverings, wall coverings and doors to choose from when building a house. After building, the player can purchase objects, such as a refrigerator, bed, or other things.
Players control the Sims in Live Mode. The main goal is to keep the Sim's eight needs up and in the green. These needs eventually go down as time goes by. If Sims have no energy, they will fall to the ground. If they are swimming and run out of energy they will drown. If they are too hungry, they will die of starvation.
Other goals include making money (called Simoleons in this game). Sims must get jobs to get more money so they can pay bills, buy new objects, and expand the house. If they do not go to work two days in a row, they will be fired. Each Sim has eight skill levels to work towards. Each skill level has 10 points. For instance, in the military job, the ultimate requirement is 10 body points. Jobs also require a certain number of friends to receive a promotion. The higher they go, the more money they make per day.
Children must go to school. If they do not keep their grades up, they will be sent to military school and will never return. They can read books to study.
"The Sims" is well known for having many expansion packs, or smaller games that add onto the main game. The player must own the original game to buy and install these packs. The Sims has 7 official expansion packs.
After it sold well on the computer, it was put on other platforms such as the PlayStation 2, PlayStation Portable, GameCube and Xbox. The console releases are:
These all follow a different concept. They are more objective-based rather than free-willed and have not been as popular as the original PC editions.
Webcam
A webcam is a video camera that connects to a computer, and can let people see each other over the Internet. Most people that have webcams use them with an instant messenger to see each other at the same time. Webcams can also be used for recording videos and video blogs. The webcam can be part of a computer, mobile phone or it can be an independent device.
The first webcam was developed in 1991 at Cambridge University and the first commercial camera started in 1994 and was made by Logitech.
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