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A knot is an intentional complication in cordage which may be useful or decorative. Practical knots may be classified as hitches, bends, splices, or knots. A hitch fastens a rope to another object; a bend unites two rope ends; a splice is a multi-strand bend or loop. Knots have excited interest since ancient times for their practical uses, as well as their topological intricacy, studied in the area of mathematics known as knot Chimes - Tea For Julie - The Sense In Tying Knots.
There is a large variety of knots, each with properties that make it suitable for a range of tasks. Some knots are used to attach the rope or other knotting material to other objects such as another rope, cleatring, or stake. Some knots are used to bind or constrict objects. Decorative knots usually bind to themselves to produce attractive patterns.
While some people can look at diagrams or photos and tie the illustrated knots, others learn best by watching how a knot is tied. Knot tying skills are often transmitted by sailorsscoutsclimberscanyonerscaversarboristsrescue professionalsstagehandsfishermenChimes - Tea For Julie - The Sense In Tying Knots and surgeons.
The International Guild of Knot Tyers is an organization dedicated to the promotion of knot tying. Truckers in need of securing a load may use a trucker's hitchgaining mechanical advantage. Knots can save spelunkers from being buried under rock. Many knots can also be used as makeshift tools, for example, the bowline can be used as a rescue loop, and the munter hitch can be used for belaying.
The diamond hitch was widely used to tie packages on to donkeys and mules. In hazardous environments such as mountains, knots are very important. In the event of someone falling into a ravine or a similar terrain feature, with the correct equipment and knowledge of knots a rappel system can be set up to lower a rescuer down to a casualty and set up a hauling system to allow a third individual to pull both the rescuer and the casualty out of the ravine.
Further application of knots includes developing a high line, which is similar to a zip line, and which can be used to move supplies, injured people, or the untrained across rivers, crevices, or ravines.
Note the systems mentioned typically require carabiners and the use of multiple appropriate knots. These knots include the bowline, double figure eight, munter hitch, munter mule, prusik, autoblock, and clove hitch. Thus any individual who goes into a mountainous environment Chimes - Tea For Julie - The Sense In Tying Knots have basic knowledge of knots and knot systems to increase safety and the ability to undertake activities such as rappelling. Knots can be applied in combination to produce complex objects such as lanyards and netting.
In ropeworkthe frayed end of a rope is held together by a type of knot called a whipping knot. Many types of textiles use knots to repair damage. Knots weaken the rope in which they are made. The bending, crushing, and chafing forces that hold a knot in place also unevenly stress rope fibers and ultimately lead to a reduction in strength. The exact mechanisms that cause the weakening and failure are complex and are the subject of continued study.
Relative knot strengthalso called knot efficiencyis the breaking strength of a knotted rope in proportion to the breaking strength of the rope without the knot. Determining a precise value for a particular knot is difficult because many factors can affect a knot efficiency test: the type of fiberthe style of ropethe size of rope, whether it is wet or dry, how the knot is dressed before loading, how rapidly it is loaded, whether Chimes - Tea For Julie - The Sense In Tying Knots knot is repeatedly loaded, and so on.
In most situations forming loops and bends with conventional knots is far more practical than using rope spliceseven though the latter can maintain nearly the rope's full strength. Prudent users allow for a large safety margin in the strength of rope chosen for a task due to the weakening effects of knots, aging, damage, shock loading, etc. The working load limit of a rope is generally specified with a significant safety factor, up to for critical applications.
Even if the rope does not break, a knot may still fail to hold. Knots that hold firm under a variety of adverse conditions are said to be more secure than those that do not. Repeated, dynamic loads will cause virtually every knot to fail. The load creates tension that pulls the rope back through the knot in the direction of the load.
If this continues far enough, the working end passes into the knot and the knot unravels and fails. This behavior can worsen when the knot is repeatedly strained and let slack, dragged over rough terrain, or repeatedly struck against hard objects such as masts and flagpoles. Even with secure knots, slippage may occur when the knot is first put under real tension. This can be mitigated by leaving plenty of rope at the working end outside of the knot, and by dressing the knot cleanly and tightening it as much as possible before loading.
Sometimes, the use of a stopper knot or, even better, a backup knot can prevent the working end from passing through the knot; but if a knot is observed to slip, it is generally preferable to use a more secure knot.
Life-critical applications often require backup knots to maximize safety. To capsize or spill a knot is to change its form and rearrange its parts, usually by pulling on specific ends in certain ways.
Often the capsized form of the knot offers little resistance to slipping or unraveling. A reef knotwhen misused as a bend, can capsize dangerously. Sometimes a knot is intentionally capsized as a method of tying another knot, as with the "lightning method" of tying Waiting In Line - Various - Kompot bowline.
Some knots, such as the carrick bendare generally tied in one form then capsized to obtain a stronger or more stable form. In knots that are meant to grip other objects, failure can be defined as the knot moving relative to the gripped object.
While the knot itself does not fail, it ceases to perform the desired function. For instance, a simple rolling hitch tied around a Wie Felsenabgrund Mir Zu Füßen – Pater Profundus - Mahler*, Bernstein*, New York Philharmonic* - T and pulled parallel to the railing might hold up to a certain tension, then start sliding.
Sometimes this problem can be corrected by working-up the knot tighter before subjecting it to load, but usually the problem requires either a knot with more wraps or a rope of different diameter or material.
Knots differ in the effort required to untie them after loading. Knots that are very difficult to untie, such as the water knotare said to "jam" or be jamming knots. Knots that come untied with less difficulty, such as the Zeppelin bendChimes - Tea For Julie - The Sense In Tying Knots referred to as " non-jamming ". The list of knots is extensive, but common properties allow for a useful system of categorization. For example, loop knots share the attribute of having some kind of an anchor point constructed on the standing end such as a loop or overhand knot into which the working end is easily hitched, using a round turn.
An example of this is the bowline. Constricting knots often rely on friction Birds We Are - End - Out Of Eden cinch down tight on loose bundles; an example is the Miller's knot. Knots may belong to more than one category. Trick knots are knots that are used as part of a magic tricka jokeor a puzzle.
They are useful for these purposes because Chimes - Tea For Julie - The Sense In Tying Knots have a deceptive appearance, being easier or more difficult to tie or untie than their appearance would suggest.
The easiest trick knot is the slip knot. Knot theory is a branch of topology. It deals with the mathematical analysis of knots, their structure and properties, and with the relationships between different knots. In topology, a knot is a figure consisting of a single loop with any number of crossing or knotted elements: a closed curve in space which may be moved around so long as its strands never pass through each other.
As a closed loop, a mathematical knot has no proper ends, and cannot be undone or untied; however, any physical knot in a piece of string can be thought of as a mathematical knot by fusing the two ends. A configuration of several knots winding around each other is called a link. Various mathematical techniques are used to classify and distinguish knots and links.
For instance, the Alexander polynomial associates certain numbers with any given knot; these numbers are different for the trefoil knotthe figure-eight knotand the unknot a simple loopshowing that one cannot be moved into the other without strands passing through each other. A simple mathematical theory of hitches has been proposed by Bayman  and extended by Maddocks and Keller. Knot tying consists of the techniques and skills employed in tying a knot in ropenylon webbingor other articles.
The proper tying of a knot can be the difference between an attractive knot and a messy one, and occasionally life and death. It is important to understand the often subtle differences between what works, and what doesn't. For example, many knots "spill" or pull through, particularly if they are not "backed up," usually with a single or double overhand knot to make sure the end of the rope doesn't make its way through the main knot, causing all strength to be lost.
The tying of a knot may be very straightforward such as with an overhand knotor it may be Intro - Necrophorus - Regres In Dezastru complicated, such as a monkey's fist knot. Tying knots correctly requires an understanding of the type of material being tied string, cordmonofilament linekernmantle ropeor nylon webbing.
The form of the material will influence the tying of a knot as well. Rope is round in cross-section, and has little dependence upon the manner in which the material is tied. Nylon webbing, on the other hand, is flat, and usually "tubular" in construction, meaning that it is spiral-woven, and has a hollow core. In order to retain as much of the strength as possible with webbing, the material must be tied "flat" such that parallel sections do not cross, and that the sections of webbing are not twisted when they cross each other within a knot.
The crossing of strands Youre My Baby - Various - Neo ROCKABILLY Story Part Three important when dealing with round rope in other knots; for example, the figure-eight loop loses strength when strands are crossed while the knot is being "finished" and tightened.
Moreover, the standing end or the end from which the hauling will be done must have the greater radius of curvature in Livin In Another World - Robin Gibb - Secret Agent finished knot to maximize the strength of the knot.
Tools are sometimes employed in the finishing or untying of a knot, such as a fida tapered piece of wood that is often used in splicing. With the advent of wire ropemany other tools are used in the tying of "knots. The hagfish is known to strip slime from its skin by tying itself into a simple overhand knot, and moving its body to make the knot travel toward the tail.
It also uses this action in reverse tail to head to pry out flesh after biting into a carcass. From Wikipedia, the free encyclopedia. For speeds, see Knot unit. For the mathematical object, see Knot mathematics. For other uses, see Knot disambiguation. This section needs additional citations for verification.
Please help improve this article by adding citations to Chimes - Tea For Julie - The Sense In Tying Knots sources. Unsourced material may be challenged and removed. Further information: List of knot terminology. Further information: List of knots.
Main article: Knot theory. Come Back Home - Various - BBE20 (Attitude, Belief & Determination) also: Capstan equation. This section does not cite any sources.
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