Different bases are often used in computers. Binary (base 2) is used because at the most simple level, computers can only deal with 0s and 1s. Hexadecimal (base 16) is used because of how computers group binary digits together. Every four binary digits turn into one hexadecimal digit when changing between them. Because there are more than 10 digits in hexadecimal, the six digits after 9 are shown as A, B, C, D, E, and F.
The oldest systems of counting used base one. Making marks on a wall, using one mark for each item counted is an example of unary counting. Some old systems of measurement use the duodecimal radix (base twelve). This is shown in English, as there are words such as dozen (12) and gross (144 = 12×12), and lengths such as feet (12 inches). Angle measurement often uses a system adapted from the Babylonian numerals with base 60.
When typing a base, the small number indicating the base is usually in base ten. This is because if the radix were written in its own base, it would always be "10," so there would be no way of knowing what base it was supposed to be in.
Here are some examples of how some numbers are written in different bases, compared to decimals:
Portuguese man o' war
The Portuguese man o' war ("Physalia physalis") is a Cnidarian invertebrate. It lives in the sea. It is sometimes called the "blue bubble", or "man-of-war". Its common name comes from a Portuguese war ship of the 15th and 16th century. The ship had triangular sails, similar in shape to the bladder of the man o' war.
The Portuguese Man o' War has a reputation for swarming in groups of thousands. It is also known for its powerful sting.
"Physalia" is not a single animal: it is a siphonophore. This is a colony of four kinds of zooids. Zooids are very small, highly modified individuals. These zooids are specialized polyps and medusoids. Though structurally similar to other cnidarians, the zooids do not live by themselves: they are attached to each other. Each type of zooid does not have some structure and functions. It depends for survival on the others doing what it cannot do by itself.
A similar group of animals are the chondrophores. They are specialized hydroids, which also float at the surface of the open ocean.
The loggerhead turtle feeds on the Portuguese man o' war. It is a common part of the turtle's diet. The skin of the turtle is too thick for the man o' war's sting to enter and launch its venom. The sea slug "Glaucus atlanticus" and the violet snail "Janthina janthina" also feed on the Portuguese man o' war. The blanket octopus "Tremoctopus" is immune to the venom of the Portuguese man o' war. The blanket octopus has been known to rip off the man o' war's tentacles and use them for defensive purposes.
The Portuguese man o' war is often found with many different kinds of marine fish. Some of them are shepherd fish, clown fish, and yellow jack. These species are rarely found anywhere else. The clown fish can swim among the tentacles without being stung. This is possibly due to its mucus that does not trigger the nematocysts. The shepherd fish seems to avoid the larger, stinging tentacles. It feeds on the smaller tentacles under the gas bladder. These fish benefit from the shelter of the stinging tentacles. It also helps the man o' war: the presence of these species may attract other fish to feed on.
Sleep apnea
Sleep apnea (or Sleep apnoea) is a problem certain people have: When they sleep, they may stop breathing for short periods. These periods can last for 10 seconds or more. 3-4 breaths are "missed". As a result of this, those affected are often tired during the day. Mainly because such people also tend to have microsleep, they should not drive vehicles. Sleep apnea is a treatable disease.
People can ask their partner or family member if they are breathing strangely when they are sleeping.
Diseases which may complicate sleep apnea are: obesity, high blood pressure, hyperlipidaemia, arrhythmia, polyemia, ischemic heart disease, cerebrovascular disease, diabetes etc.
Sleep apnea is a risk factor of arteriosclerotic disease.
When there are no house mates, it may take time to discover this condition. When especially subjective symptoms are weak, the state will get worse gradually and it will start a serious problem.
Microsleep
Microsleep is a very short sleep that occurs when people are awake. It can last from under a second to about 30 seconds. It may happen as a result of sleep deprivation, fatigue, sleep apnea, narcolepsy, or hypersomnia. Microsleeps can occur at any time. Most of the time, they do so without warning. When people have a microsleep during conversation, they may lose track of the subject that was talked about.
Microsleep can be extremely dangerous in situations when people drive a car, work on a machine or otherwise need to stay alert. People with microsleeps usually are not aware of them. They instead believe that they were awake all the time. One example is called "gap driving": a person is driving a car and suddenly realizes that several seconds have passed by unnoticed. The driver does not feel that she or he has been asleep during those missing seconds, although this is in fact what happened. The sleeping driver is at very high risk for having an accident during microsleep.
Many accidents and catastrophes have resulted from microsleep episodes in these circumstances. For example, a microsleep episode is claimed to have been one factor contributing to the Waterfall train disaster in 2003; the driver had a heart attack and the guard who should have reacted to the train's increasing speed is said by his defender to have microslept.
Ajaz Anwar
Ajaz Anwar is a Pakistani painter. He was born in 1946. He has a PhD. He is currently a professor at the National College of Fine Arts in Lahore. He paints in watercolour. Many of his paintings feature Lahore.
He received the president’s Pride of Performance award in 1997.
Lilo Pelekai
Lilo Pelekai (first name LEE-lo, last name Peh-leh-kai) is one of the two characters of the Disney animated movie "Lilo & Stitch", its sequels, and . Lilo (literally, ""lost"" in Hawaiian, and also in Mandarin). Lilo is a young Hawaiian girl who lives on the island of Kauai with her older sister Nani and her new family of alien visitors that live on Earth.
Thyreophora
Thyreophora is a suborder of ornithischian dinosaurs. They were the armoured dinosaurs: the name means 'shield-bearer'. They are divided into these groups:
"Acanthopholis" was 15 feet long, walked on four legs, lived in the Lower Cretaceous). Its armour consists of many oval plates that go from its neck to its tail. That lived 100 million yeas ago. The name 'spiny scales' refers to its armour.
Knobbed whelk
The knobbed whelk ("Busycon carica") is a gastropod mollusc which is protected by a thick, hard shell. It is large predatory sea snail, or whelk.
This mollusc is found in shallow waters of the Atlantic Ocean off the east coast of North America from Massachusetts to northern Florida.
This whelk has a spiral shell with knobs (or spines) along its shoulder. The shell is up to 9.5 inches (24 cm) long. The shell is light gray to tan, and often has brown and white streaks.
On the shallow-water mud flats whelks prey on oysters, clams, and other marine bivalves. They wedge the bivalve open using the edge of their shell. Then they squeeze in their radula. This is a rough tongue-like organ that has thousands of tiny denticles (tooth-like protrusions).
Shasta County
Shasta County is a county in northern California, in the United States. It is in the Sacramento Valley part of the Central Valley of California. 163,256 people live there. The county seat, as well as the biggest city, is Redding. One major attraction in the county is Shasta Dam and Shasta Lake, one of the biggest dams in the state of California.
Tehama County, California