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Figure-Eight Loops
Figure 8 (figure of 8 in British English) may refer to: * 8 (number), in Arabic numerals Entertainment * ''Figure 8'' (album), a 2000 album by Elliott Smith * "Figure of Eight" (song), a 1989 song by Paul McCartney * ''Figure Eight EP'', a 2008 EP by This Et Al * "Figure 8" (song), a 2012 song by Ellie Goulding from ''Halcyon'' * "Figure Eight", an episode and song from the children's educational series ''Schoolhouse Rock!'' * "Figure of Eight", song by Status Quo from ''In Search of the Fourth Chord'' * "Figure 8", a song by FKA Twigs from the EP ''M3LL155X'' Geography * Figure Eight Island, North Carolina, United States * Figure Eight Lake, Alberta, Canada * Figure-Eight Loops, feature of the Historic Columbia River Highway in Guy W. Talbot State Park Mathematics and sciences * Figure-eight knot (mathematics), in knot theory * ∞, symbol meaning infinity * Lemniscate, various types of mathematical curve that resembles a figure 8 * Figure 8, a two-lobed Lissajous cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8 (number)
8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of the form , being an integer greater than 1. * the first number which is neither prime nor semiprime. * the base of the octal number system, which is mostly used with computers. In octal, one digit represents three bits. In modern computers, a byte is a grouping of eight bits, also called an wikt:octet, octet. * a Fibonacci number, being plus . The next Fibonacci number is . 8 is the only positive Fibonacci number, aside from 1, that is a perfect cube. * the only nonzero perfect power that is one less than another perfect power, by Catalan conjecture, Mihăilescu's Theorem. * the order of the smallest non-abelian group all of whose subgroups are normal. * the dimension of the octonions and is the highest possible dimension of a normed divisio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure-eight Knot
The figure-eight knot or figure-of-eight knot is a type of stopper knot. It is very important in both sailing and rock climbing as a method of stopping ropes from running out of retaining devices. Like the overhand knot, which will jam under strain, often requiring the rope to be cut, the figure-eight will also jam, but is usually more easily undone than the overhand knot. The stevedore knot is the figure-eight knot with two half twists added before the end is finally stuck. Different types Figure-eight loop The figure-eight loop is used like an overhand loop knot. This type of knot can be used in prusik climbing when used in conjunction with a climbing harness, a climbing rope, and locking carabiner designed for climbing, to ascend or descend with minimal equipment and effort. Figure-eight bend The figure-eight bend knot is used to " splice" together two ropes, not necessarily of equal diameter. This knot is tied starting with a loose figure-eight knot on one rope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEC 60320 C7
IEC 60320 Appliance couplers for household and similar general purposes is a set of standards from the International Electrotechnical Commission (IEC) specifying non-locking connectors for connecting power supply cords to electrical appliances of voltage not exceeding 250 V (a.c.) and rated current not exceeding 16 A. Different types of connector (distinguished by shape and size) are specified for different combinations of current, temperature and Ground (electricity), earthing requirements. Unlike IEC 60309 connectors, they are not coded for voltage; users must ensure that the voltage rating of the equipment is compatible with the mains supply. The standard uses the term ''coupler'' to encompass connectors on power cords and power inlets and outlets built into appliances. The first edition of IEC 320 (later renumbered IEC 60320) was published in 1970. Terminology ''Appliance couplers'' enable the use of standard inlets and country-specific cord sets which allow manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microphone
A microphone, colloquially called a mic or mike (), is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting. They are also used in computers for recording voice, speech recognition, VoIP, and for other purposes such as ultrasonic sensors or knock sensors. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the contact microphone, which uses a crystal of piezoelectric material. Microphones typically n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure 8 Puffer
''Dichotomyctere ocellatus'' (syn. ''Tetraodon biocellatus''), commonly the figure 8 puffer or eyespot puffer, is a pufferfish found in freshwater in Southeast Asia. It is known from the lower reaches of the Mekong (Cambodia), the Peninsular Malaysia as well as Borneo (Sarawak, Kalimantan). Characteristics Figure 8 puffers grow to about total length (TL). They are colourful fish, with greenish yellow patterns on their backs. These patterns vary greatly from fish to fish, but the markings either side of the caudal fin resemble the number eight, or eye-spots (earning the species another common name as "eyespot puffer"). Figure 8 puffers are relatively peaceful among Tetraodontidae, and have been kept successfully with other fish such as bumblebee gobies and mollies, but as with all pufferfish there is a risk that tankmates will not be tolerated. Like all members of its family, the figure 8 puffer is capable of inflating itself with water or air when stressed or otherwise frigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure Eight (angling)
The figure eight is a technique used by anglers to fish specifically for the muskellunge. It has been developed due to the nature of the fish's hunting style. Essentially, the figure eight is a final enticement performed by the angler just before lifting the lure out of the water for another cast. To help visualize the concept, think of a roller coaster. As the lure is moved from side to side, it also moves up and down. The figure eight is named after the pattern in which the angler pulls the lure through the water next to the boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ... as an attempt to get a following fish to bite. The muskellunge is known for “following” a lure up to the boat rather than immediately striking it. Anglers use different tactics to influence a follow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Country Dance
A country dance is any of a very large number of social dances of a type that originated in the British Isles; it is the repeated execution of a predefined sequence of figures, carefully designed to fit a fixed length of music, performed by a group of people, usually in couples, in one or more sets. The figures involve interaction with your partner and/or with other dancers, usually with a progression so that you dance with everyone in your set. It is common in modern times to have a "caller" who teaches the dance and then calls the figures as you dance. Country dances are done in many different styles. As a musical form written in or time, the contredanse was used by Beethoven and Mozart. Introduced to South America by French immigrants, Country Dance had great influence upon Latin American music as contradanza. The ''Anglais'' (from the French word meaning "English") or ''Angloise'' is another term for the English country dance. A Scottish country dance may be termed an . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure 8 (belay Device)
The figure 8 belay device is a piece of metal (usually an aluminum alloy) in the shape of an 8 with one large end and one small end. Usage This device utilizes a large surface area in contact with a climbing rope to provide sufficient friction along with proper technique to be used as a belay device or for rappelling. A figure 8 (sometimes just referred to as an 8) is used in conjunction with a climbing harness and locking carabiner to control a belayed climber's descent, or one's own descent when rappelling. Pros Figure-eights offer a smooth controlled descent when rappelling and lowering climbers. They can be used with nearly any diameter climbing rope A dynamic rope is a specially constructed, somewhat elastic rope used primarily in rock climbing, ice climbing, and mountaineering. This elasticity, or stretch, is the property that makes the rope dynamic—in contrast to a static rope that has ... and don't get as hot as other friction devices because of their ability to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man Overboard Rescue Turn
A man overboard rescue turn (or person overboard) is a shiphandling manoeuvre usually implemented immediately upon learning of a person having gone overboad into the sea. To bring a vessel closer to the person's location, implementations of the principles described are: the Anderson turn (or single turn), the quick turn (also known as the Q-turn or the figure eight turn), the Williamson turn, and the Scharnow turn. The choice of manouevre is dependent on several factors, including: * Location of the casualty * Whether the casualty is seen going overboard immediately or if their missing is delayed * Whether the ship is using engines or using sails * The space available for the vessel to steer * The training of the crew involved. Ideally, in any man overboard scenario, the casualty should be approached with the vessel downwind of the persons position, with the vessel moving upwind. The man overboard rescue turn is often carried out as part of regular drills on Merchant ships as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noseband
A noseband is the part of a horse's bridle that encircles the nose and jaw of the horse. In English riding, where the noseband is separately attached to its own headstall or crownpiece, held independently of the bit, it is often called a cavesson or caveson noseband. In other styles of riding, a simple noseband is sometimes attached directly to the same headstall as the bit. Development A noseband may have been one of the first tools used by humans to domesticate and ride horses. The bit developed later. The noseband was originally made of leather or rope. After the invention of the bit, the noseband was, in some cultures, demoted to a halter worn beneath the bridle that allowed the rider to remove the bit from the horse's mouth after work and leave a restraining halter on underneath, or to tie the horse by this halter, instead of by the bit, which could result in damage to the horse's mouth if it panicked. However, its ability to hold a horse's mouth shut over the bit was also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Riding Figures
Riding figures are prescribed paths a horse is ridden on in a riding arena, usually for training purposes. Figures may also be performed out in a field or other open area, but a riding arena provides markers that can help indicate the correctness in the size or shape of a figure. Purposes of ring figures Ring figures are a valuable training aid, giving the rider feedback as to his horse's training and weaknesses. A poorly executed ring figure may point out where the rider is lacking in control, and areas in which the horse needs additional training. For example, when riding down the diagonal, a rider may struggle to keep his horse on the correct path, suggesting issues with straightness. A poorly performed 20-meter circle may indicate that the horse is not truly between the aids, perhaps falling out through a shoulder, or that the rider is sitting crookedly. Figures are required components of dressage tests, are used in reining competition, and may also be asked for in equitatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compulsory Figures
Compulsory figures or school figures were formerly a segment of figure skating, and gave the sport its name. They are the "circular patterns which skaters trace on the ice to demonstrate skill in placing clean turns evenly on round circles". For approximately the first 50 years of figure skating as a sport, until 1947, compulsory figures made up 60 percent of the total score at most competitions around the world. These figures continued to dominate the sport, although they steadily declined in importance, until the International Skating Union (ISU) voted to discontinue them as a part of competitions in 1990. Learning and training in compulsory figures instilled discipline and control; some in the figure skating community considered them necessary to teach skaters basic skills. Skaters would train for hours to learn and execute them well, and competing and judging figures would often take up to eight hours during competitions. Skaters traced compulsory figures, and were judged acco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
