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Pinning Robot
Pinning may refer to: * Pinning, the effect of certain weapons that cause their targets to be pinned down * Pinning ceremony (nursing), a symbolic welcoming of new graduates into the nursing profession * Pinning force, a force acting on a pinned object from a pinning center * Pinning (modelling), the use of pins to strengthen the joins when assembling large or heavy model kits * Pinning points, points in a crystalline material that act to halt a dislocation's movement * Pinning hold, a hold used to control an opponent in grappling * Flux pinning, a phenomenon that magnetic flux lines do not move despite the Lorentz force acting on them inside a current-carrying Type II superconductor * Percutaneous pinning, a technique used by orthopedic surgeons for the stabilisation of unstable fractures * Tree pinning, inserting spikes into trees in order to cause damage to sawmill equipment * Zener pinning, the influence of a dispersion of fine particles on the movement of low- and high angle gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinned Down
In military science, suppressive fire is "fire that degrades the performance of an enemy force below the level needed to fulfill its mission". When used to protect exposed friendly troops advancing on the battlefield, it is commonly called covering fire. Suppression is usually only effective for the duration of the fire. It is one of three types of fire support, which is defined by NATO as "the application of fire, coordinated with the maneuver of forces, to destroy, neutralise or suppress the enemy". Before NATO defined the term, the British and Commonwealth armies generally used "neutralisation" with the same definition as suppression. NATO now defines neutralisation as "fire delivered to render a target temporarily ineffective or unusable." Usage Suppressive fire usually achieves its effect by threatening casualties to individuals who expose themselves to it. Willingness to expose themselves varies depending on the morale, motivation and leadership of the target troop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinning Ceremony (nursing)
A pinning ceremony is a symbolic welcoming of newly graduated or soon-to-be graduated nurses into the nursing profession. The history of the ceremony dates back to the Crusades in the 12th century, and later, when Queen Victoria awarded Florence Nightingale the Royal Red Cross for her service as a military nurse during the Crimean War. By 1916, pinning ceremonies had become an established tradition in both the United Kingdom and the United States, although, by the 2010s, many nursing schools in the United States had abolished them. At pinning ceremonies, nurses are presented with nursing pins by either the faculty of their nursing school or by a person significant to them. These ceremonies also often include a candle-lighting or lamp-lighting ceremony, which commemorates Nightingale's nighttime aid to wounded soldiers by candlelight, and the reciting of the Nightingale Pledge, the International Council of Nurses Pledge, or another similar pledge. A pinning ceremony is not a gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinning Force
Pinning force is a force acting on a pinned object from a pinning center. In solid state physics, this most often refers to the vortex pinning, the pinning of the magnetic vortices ( magnetic flux quanta, Abrikosov vortices) by different kinds of the defects in a type II superconductor. Important quantities are the ''individual'' maximal pinning force, which defines the depinning of a single vortex, and an ''average'' pinning force, which defines the depinning of the correlated vortex structures and can be associated with the critical current density (the maximal density of non-dissipative current). The interaction of the correlated vortex lattice with system of pinning centers forms the magnetic phase diagram of the vortex matter in superconductors. This phase diagram is especially rich for high temperature superconductors ( HTSC) where the thermo-activation processes are essential. The pinning mechanism is based on the fact that the amount of grain boundary area is reduced whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinning (modelling)
Pinning is a technique used when assembling large or heavy model kits (such as metal wargaming miniatures) that involves drilling a hole in two pieces of the model to be joined, and using a "pin" to strengthen the bond when they are glued. Pinning is a useful technique for reinforcing joints and is essential when making models from parts that were not designed to go together, such as a miniature conversion. While models that are used for display purposes do not often require pinning, heavy models that are frequently handled (such as large metal miniatures used for wargaming) will often benefit from pinning to ensure that the model does not come apart. Some modellers also use Blu Tack or another temporary adhesive as an aid when pinning. See also *Miniature conversion Miniature conversion refers to the practice of altering the appearance of a miniature or model so as to deviate from the standard version purchased in a boxed set. This practice is quite common amongst hobbyis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinning Points
In a crystalline material, a dislocation is capable of traveling throughout the lattice when relatively small stresses are applied. This movement of dislocations results in the material plastically deforming. Pinning points in the material act to halt a dislocation's movement, requiring a greater amount of force to be applied to overcome the barrier. This results in an overall strengthening of materials. Types of pinning points Point defects Point defects (as well as stationary dislocations, jogs, and kinks) present in a material create stress fields within a material that disallow traveling dislocations to come into direct contact. Much like two particles of the same electric charge feel a repulsion to one another when brought together, the dislocation is pushed away from the already present stress field. Alloying elements The introduction of atom1 into a crystal of atom2 creates a pinning point for multiple reasons. An alloying atom is by nature a point defect, thus it must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinning Hold
A grappling hold, commonly referred to simply as a hold that in Japanese is referred to as ''katame-waza'' ( "grappling technique"), is any specific grappling, wrestling, judo, or other martial art grip that is applied to an opponent. Grappling holds are used principally to control the opponent and to advance in points or positioning. The holds may be categorized by their function, such as clinching, pinning, or submission, while others can be classified by their anatomical effect: chokehold, headlock, joint-lock, or compression lock. Multiple categories may be appropriate for some of these holds. Clinch hold A clinch hold (also known as a clinching hold) is a grappling hold that is used in clinch fighting with the purpose of controlling the opponent. In wrestling it is referred to as the tie-up. The use of a clinch hold results in the clinch. Clinch holds can be used to close in on the opponent, as a precursor to a takedown or throw, or to prevent the opponent from moving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flux Pinning
Flux pinning is a phenomenon that occurs when flux vortices in a type-II superconductor are prevented from moving within the bulk of the superconductor, so that the magnetic field lines are "pinned" to those locations. The superconductor must be a type-II superconductor because type-I superconductors cannot be penetrated by magnetic fields. Some type-I superconductors can experience the effects of flux pinning if they are thin enough. If the material's thickness is comparable to the London penetration depth, the magnetic field can pass through the material. The act of magnetic penetration is what makes flux pinning possible. At higher magnetic fields (above Hc1 and below Hc2) the superconductor allows magnetic flux to enter in quantized packets surrounded by a superconducting current vortex (see Quantum vortex). These sites of penetration are known as flux tubes. The number of flux tubes per unit area is proportional to the magnetic field with a constant of proportionality equal to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percutaneous Pinning
Percutaneous pinning is a technique used by orthopedic and podiatric surgeons for the stabilization of unstable fractures. Percutaneous pinning involves inserting wires through a person's skin for stabilizing the fractured bone. Uses Many fractures can be manipulated into wholly satisfactory positions, immobilized in an appropriate cast and allowed to heal. Some fractures, however, cannot be held in a satisfactory position by this method, and require some additional form of fixation. This is the usual situation with all displaced fractures of the first metacarpal and of the proximal phalanges of the hand, and of about two thirds of fractures of the distal end of the radius. Percutaneous pinning is considered to be less invasive, faster, and requires less skill compared to open surgery (plate fixation). Disadvantages of this technique include that the stabilized fracture is less stable compared to a surgical plate, the person may require extensive limits to their motion at the ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Pinning
Tree spiking involves hammering a metal rod, nail or other material into a tree trunk, either inserting it at the base of the trunk where a logger might be expected to cut into the tree, or higher up where it would affect the sawmill later processing the wood. It is used to prevent logging by risking damage to saws, in the forest or at the mill, if the tree is cut, as well as possible injury or death to the worker. The spike can also lower the commercial value of the wood by causing discoloration, reducing the economic viability of logging in the long term, without threatening the life of the tree. It is illegal in the United States, and has been described as a form of eco-terrorism. History It was first mentioned in the context of discouraging logging in Earth First! magazine. It came to prominence as a contentious tactic within unconventional environmentalist circles during the 1980s, after it was advocated by Earth First! co-founder Dave Foreman in his book ''Ecodefense''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zener Pinning
Zener pinning is the influence of a dispersion of fine particles on the movement of low- and high-angle grain boundaries through a polycrystalline material. Small particles act to prevent the motion of such boundaries by exerting a pinning pressure which counteracts the driving force pushing the boundaries. Zener pinning is very important in materials processing as it has a strong influence on recovery, recrystallization and grain growth. Origin of the pinning force A boundary is an imperfection in the crystal structure and as such is associated with a certain quantity of energy. When a boundary passes through an incoherent particle then the portion of boundary that would be inside the particle essentially ceases to exist. In order to move past the particle some new boundary must be created, and this is energetically unfavourable. While the region of boundary near the particle is pinned, the rest of the boundary continues trying to move forward under its own driving force. This re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HTTP Public Key Pinning
HTTP Public Key Pinning (HPKP) is an obsolete Internet security mechanism delivered via an HTTP header which allows HTTPS websites to resist impersonation by attackers using misissued or otherwise fraudulent digital certificates. A server uses it to deliver to the client (e.g. web browser) a set of hashes of public keys that must appear in the certificate chain of future connections to the same domain name. For example, attackers might compromise a certificate authority, and then mis-issue certificates for a web origin. To combat this risk, the HTTPS web server serves a list of “pinned” public key hashes valid for a given time; on subsequent connections, during that validity time, clients expect the server to use one or more of those public keys in its certificate chain. If it does not, an error message is shown, which cannot be (easily) bypassed by the user. The technique does not pin certificates, but public key hashes. This means that one can use the key pair to get a cert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pin (other)
A pin is a device used for fastening objects or material together. Pin or PIN may also refer to: People * Ayah Pin (1941–2016), Malaysian cult leader Surname "Pin" * Camille Pin (born 1981), French tennis player * Celeste Pin (born 1961), Italian soccer player * Doriane Pin (born 2004), French racing driver * Gabriele Pin (born 1962), Italian soccer player * Jean-Éric Pin, French mathematician Given name "Pin" * Haing Pin (1942–2020), Cambodian Khmer Rouge leader * Luo Pin (1733–1799; zh, links=no, 羅聘), Chinese Qing Dynasty painter * Lu Pin (other), several people * Pin Malakul (1903–1995), Thai educator * Mun Pin (1998–2023; ko, link=no, 문빈), South Korean entertainer * Sun Pin (3rd century BCE), Chinese Warring States era general * Ts'ao Pin (931–999; zh, links=no, 曹彬), Chinese general * Wang Pin (born 1974; zh, links=no, 王频), chess player * Wen Pin (3rd century CE), Chinese Three Kingdoms era general * Wu Pin (16th century CE; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
