After World War I, the western part of Rhineland was under Allied control and demilitarized, with no military activities allowed, under the Treaty of Versailles. German forces sent armies back to it in 1936, three years before World War II began.
Handstand
A handstand is the act of holding the body upside down balancing on the hands. The body is held straight with arms and legs fully extended. The hands are placed about shoulder-width apart. A handstand performer must have balance and upper body strength.
Handstands are used in many activities, including acro dance, acrobatics, cheerleading and gymnastics. Some type of handstand is performed on all gymnastic equipment. Many tumbling skills pass through a handstand position as part of the action. Breakdancers use handstands in freezes and kicks. Sometimes a handstand is used as a starting position for diving. In games or contests, swimmers will sometimes do underwater handstands on pool bottoms with legs and feet extended above the water.
Handstands are known by various other names. In yoga, the handstand is known as "Adho Mukha Vrksasana" (pronounced AHD-hoh MOOK-hah vrik-SHAH-sah-nah) translating to Downward-facing Tree Pose, and in capoeira it is named bananeira.
There are two basic handstands used in modern gymnastics: "curved-back" and "straight-back". Straight-back style is used when straight body lines are wanted and possible. In many cases the curved-back style is better as it has much better control over balance. Balance is kept by shifting body weight towards the fingers or the heel of the hand.
All basic handstands have these features:
Straight-back handstands have these characteristics:
Common handstand variations include:
Globular cluster
A globular cluster is a group of stars of a similar age which often orbits the central bulge of a galaxy. Gravity holds clusters together and gives them their spherical shape. Towards the centre of a clusters there are many stars in a relatively small space.
Globular clusters occur in the halo of a galaxy and in its disk. Those in the halo contain many more stars and are much older than the less dense open clusters in the disk. Globular clusters are fairly common: there are about 150 to 158 known globular clusters in the Milky Way. Large galaxies can have more: Andromeda may have as many as 500.
Some giant elliptical galaxies, particularly those at the centres of galaxy clusters, such as M87, have as many as 13,000 globular clusters. These globular clusters orbit the galaxy out to huge distances, 40 kiloparsecs (approximately 131,000 light-years) or more.
Every galaxy of sufficient mass in the Local Group has its group of globular clusters, and almost every large galaxy surveyed has a system of globular clusters. The Sagittarius Dwarf and Canis Major Dwarf galaxies appear to be in the process of donating their associated globular clusters (such as Palomar 12) to the Milky Way. This demonstrates how many of this galaxy's globular clusters might have been acquired in the past.
The first globular cluster discovered was M22 in 1665, but individual stars in a globular cluster were not seen until Charles Messier observed M4. The first eight globular clusters discovered are shown in the table. The "M" before a number refers to the catalogue of Charles Messier, while "NGC" is from the New General Catalogue.
William Herschel began a survey program in 1782 using larger telescopes and was able to resolve the stars in all 33 of the known globular clusters. In addition he found 37 additional clusters. In Herschel's 1789 catalog of deep sky objects, his second such, he became the first to use the name "globular cluster" as their description.
The number of globular clusters discovered continued to increase, reaching 83 in 1915, 93 in 1930 and 97 by 1947. A total of 152 globular clusters have now been discovered in the Milky Way galaxy, out of an estimated total of 180 ± 20. These additional, undiscovered globular clusters are believed to be hidden behind the gas and dust of the Milky Way.
Boomerang (roller coaster)
Boomerang is a coaster type made by Vekoma, named after the original boomerang. The first Boomerang began operation in 1984 at Rafaela Padilla in Puebla, México (which has since been moved to Six Flags México), and it has become one of the most repeated roller coaster designs in the world, with 41 Boomerangs operating as of 2011, another two "Standing but not operating" or in storage, and one currently under construction.
The Boomerang operates with one train with 7 cars, each capable of carrying 4 people (28 people per train). The ride starts with the train being pulled backwards out of the station, up a lift hill by a catch-car. When the catch-car reaches the end of the lift hill, it releases the train, which rolls down through the station, then into a cobra roll. After the cobra roll, it goes through a loop after which it clicks onto a chain on the second lift hill. When the train reaches the end of the second lift hill, the chain is moved down, which causes the train to roll down (as it is not attached to the chain anymore) and do the same track backwards.
Boomerang coasters have sometimes stalled, often in the cobra Roll element. As a precaution, many Boomerang coasters, are built with an access platform just under the cobra roll. Also, sometimes the train gets stuck on the second lift hill.
Semiprime
In number theory, a natural number is called semiprime if it can be written as the product of two prime numbers. The two numbers do not need to be different. A semiprime can also be the square of a prime number. Such numbers are very useful for cryptography.
Rattle Snake
Rattle Snake (previous names "Keverbaan", "Road Runner" and "Woks Waanzin") is a steel roller coaster in Walibi Holland in the Netherlands. It was built by Zierer
Rattle Snake was built in 1994 by Walibi Flevo as "Keverbaan". When Six Flags took over the park in 2000, the name was changed to "Road Runner". Six Flags decided to paint the track brown instead of red, but later they decided to paint it back to red in 2004. After the park name was changed to Walibi World, "Road Runner" was renamed to "Woks Waanzin", but due to the name change in 2011 to Walibi Holland, the mascotte "Wok" disappeared and the coaster was renamed to Rattle Snake. It moved to another section of the park, replacing "Flying Dutchman Gold Mine". The coaster has a capacity of 1000 people per hour.
Rattle Snake on the Walibi Holland website
Bit rate
Bit rate (also called bitrate, data rate, or "R") is how fast bits move from one place to another. It is measured in bits per second (bit/s).
It is different from symbol rate and bandwidth, but part of the same group.
Renal disease
Renal disease is the name for a disease or condition that mainly affects the kidneys. Medical words for renal disease are nephropathy or nephrosis.
There are many possible causes of renal disease, including:
If renal disease gets bad enough, it can cause renal failure, where the kidneys do not work at all.
Florida, Chile
Florida is a city and commune in Chile with 10067 inhabitants and an area of 609 square kilometres, all according to the census on 2002. The city is located at 42 kilometres to the eastern of Concepción.
The city was founded on 1755 by Antonio de Seravia.
Lions Gate Entertainment
Lions Gate Entertainment, more often known as Lionsgate, is a Canadian-American motion picture and television company. It was formed in Vancouver in 1995, and is currently headquartered in Santa Monica, California. As of 2007, it is the most commercially successful independent movie and television distribution company in North America.
Lionsgate produces movies that major American studios would not accept because they are too controversial or too disturbing for major studios. Movies produced by Lionsgate include the "Saw" franchise, "Kick-Ass", Tyler Perry films and many other movies.