The Tower of Hanoi is a mathematical game or puzzle consisting of three rods and a number of disks of various diameters, which can slide onto any rod. The puzzle begins with the disks stacked on one rod in order of decreasing size, the smallest at the top, thus approximating a conical shape. The objective of the puzzle is to move the entire stack to the last rod, obeying the following rules:
- Only one disk may be moved at a time.
- Each move consists of taking the upper disk from one of the stacks and placing it on top of another stack or on an empty rod.
- No disk may be placed on top of a disk that is smaller than it.
Polyethylene glycol (PEG; ) is a polyether compound derived from petroleum with many applications, from industrial manufacturing to medicine. PEG is also known as polyethylene oxide (PEO) or polyoxyethylene (POE), depending on its molecular weight. The structure of PEG is commonly expressed as H−(O−CH2−CH2)n−OH.
Pegasus is a constellation in the northern sky, named after the winged horse Pegasus in Greek mythology. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and is one of the 88 constellations recognised today.
Mastermind or Master Mind is a code-breaking game for two players. It resembles an earlier pencil and paper game called Bulls and Cows that may date back a century.
The Nepalese rupee is the official currency of the Federal Democratic Republic of Nepal(Formally). The Nepalese rupee is subdivided into 100 paisa. The issuance of the currency is controlled by the Nepal Rastra Bank, the central bank of Nepal. The Nepalese rupee was introduced in 1932 when it replaced the Nepalese mohar at the rate 2:1.
The ngultrum is the currency of the Kingdom of Bhutan. It can be literally translated as 'silver' for ngul and 'coin' for trum. It is subdivided into 100 chhertum. The Royal Monetary Authority of Bhutan, the central bank of Bhutan is the minting authority of the ngultrum banknotes and coins. The ngultrum is currently pegged to the Indian rupee at parity.
A mallet is a tool used for imparting force on another object, often made of rubber or sometimes wood, that is smaller than a maul or beetle, and usually has a relatively large head. The term is descriptive of the overall size and proportions of the tool, and not the materials it may be made of, though most mallets have striking faces that are softer than steel.
Percutaneous endoscopic gastrostomy (PEG) is an endoscopic medical procedure in which a tube is passed into a patient's stomach through the abdominal wall, most commonly to provide a means of feeding when oral intake is not adequate. This provides enteral nutrition despite bypassing the mouth; enteral nutrition is generally preferable to parenteral nutrition. The PEG procedure is an alternative to open surgical gastrostomy insertion, and does not require a general anesthetic; mild sedation is typically used. PEG tubes may also be extended into the small intestine by passing a jejunal extension tube through the PEG tube and into the jejunum via the pylorus.
A pegleg is a prosthesis, or artificial limb, fitted to the remaining stump of a human leg. Its use dates to antiquity.
Aqueous biphasic systems (ABS) or aqueous two-phase systems (ATPS) are clean alternatives for traditional organic-water solvent extraction systems.
The Tower of London test is a test used in applied clinical neuropsychology for the assessment of executive functioning specifically to detect deficits in planning, which may occur due to a variety of medical and neuropsychiatric conditions. It is related to the classic problem-solving puzzle known as the Tower of Hanoi.
An ocular prosthesis, artificial eye or glass eye is a type of craniofacial prosthesis that replaces an absent natural eye following an enucleation, evisceration, or orbital exenteration. The prosthesis fits over an orbital implant and under the eyelids. Though often referred to as a glass eye, the ocular prosthesis roughly takes the shape of a convex shell and is made of medical grade plastic acrylic. A few ocular prostheses today are made of cryolite glass. A variant of the ocular prosthesis is a very thin hard shell known as a scleral shell which can be worn over a damaged or eviscerated eye. Makers of ocular prosthetics are known as ocularists. An ocular prosthesis does not provide vision; this would be a visual prosthesis. Someone with an ocular prosthesis is altogether blind on the affected side and has monocular vision.
Songs of the Underground Railroad were spiritual and work songs used during the early-to-mid 19th century in the United States to encourage and convey coded information to escaping slaves as they moved along the various Underground Railroad routes. As it was illegal in most slave states to teach slaves to read or write, songs were used to communicate messages and directions about when, where, and how to escape, and warned of dangers and obstacles along the route.
Cape Verde is an island nation, part of the Macaronesian group of islands of the Atlantic Ocean and was a Portuguese colony during the colonial era between 1460 and 1975. EU-Cape Verde relations are founded on the EU/Cape Verde Special Partnership, agreed in 2007, building on six pillars:
Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating his anus with a strap-on dildo.
Peg Leg Joe is a legendary sailor and underground railroad conductor, popularly associated with the song "Follow the Drinkin' Gourd". According to the folklorist H.B. Parks, who collected the song in the 1910s, Peg Leg Joe was an abolitionist who led enslaved people through the Underground Railroad to freedom during the last years of American slavery. In popular history, he is usually connected with an escape route which led from Alabama to the Ohio River. He may have been a real person or composite of people, but there is no reliable historical evidence of his existence. It is also possible that the story of Peg Leg Joe originates in the African mythical figure, Papa Legba. As his name suggests, Peg Leg Joe is depicted as having a prosthesis for his right leg.
Stereoscopic acuity, also stereoacuity, is the smallest detectable depth difference that can be seen in binocular vision.
SW Andromedae is a variable star in the constellation of Andromeda. It is classified as an RR Lyrae star, and varies from an apparent magnitude of 10.09 at minimum brightness to a magnitude of 9.14 at maximum brightness with a period of 0.44226 days.
DY Pegasi, abbreviated DY Peg, is a binary star system in the northern constellation of Pegasus. It is a well-studied SX Phoenicis variable star with a brightness that ranges from an apparent visual magnitude of 9.95 down to 10.62 with a period of 1.75 hours. This system is much too faint to be seen with the naked eye, but can be viewed with large binoculars or a telescope. Based on its high space motion and low abundances of heavier elements, it is a population II star system.
LO Pegasi is a single star in the northern constellation of Pegasus that has been the subject of numerous scientific studies. LO Pegasi, abbreviated LO Peg, is the variable star designation. It is too faint to be viewed with the naked eye, having an apparent visual magnitude that ranges from 9.04 down to 9.27. Based on parallax measurements, LO Peg is located at a distance of 79 light years from the Sun. It is a member of the young AB Doradus moving group, and is drifting closer with a radial velocity of −23 km/s.
