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Feder (fencing)
The ''Feder'' (plural ''Federn''; also ''Fechtfeder'', plural ''Fechtfedern''), is a type of training sword used in '' Fechtschulen'' (fencing schools) of the German Renaissance. The type has existed since at least the 15th century, but it came to be widely used as a standard training weapon only in the 16th century (when longsword fencing had ceased to have a serious aspect of duelling, as duels were now fought with the rapier), shown extensively in the fighting manuals of the time, particularly those of Paulus Hector Mair and Joachim Meyer, and it remained in use in such ''Fechtschulen'' well into the 17th, and in some cases for much of the 18th century. The origin of the term "Feder" for these swords is uncertain. The German word ''Feder'' means "feather" or "quill", but came to be used of metal springs in the 17th century (i.e. at about the same time as the name of the sparring weapon and possibly influenced by it). The term ''Fechtfeder'' itself seems to be connected to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sword
A sword is an edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter blade with a pointed tip. A slashing sword is more likely to be curved and to have a sharpened cutting edge on one or both sides of the blade. Many swords are designed for both thrusting and slashing. The precise definition of a sword varies by historical epoch and geographic region. Historically, the sword developed in the Bronze Age, evolving from the dagger; the earliest specimens date to about 1600 BC. The later Iron Age sword remained fairly short and without a crossguard. The spatha, as it developed in the Late Roman army, became the predecessor of the European sword of the Middle Ages, at first adopted as the Migration Period sword, and only in the High Middle Ages, developed into the classical arming sword with crossguard. The word '' sword'' continue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hilt
The hilt (rarely called a haft or shaft) of a knife, dagger, sword, or bayonet is its handle, consisting of a guard, grip and pommel. The guard may contain a crossguard or quillons. A tassel or sword knot may be attached to the guard or pommel. Pommel The pommel (Anglo-Norman "little apple") is an enlarged fitting at the top of the handle. They were originally developed to prevent the sword from slipping from the hand. From around the 11th century in Europe they became heavy enough to be a counterweight to the blade. This gave the sword a point of balance not too far from the hilt allowing a more fluid fighting style. Depending on sword design and swordsmanship style, the pommel may also be used to strike the opponent (e.g., using the Mordhau technique). Pommels have appeared in a wide variety of shapes, including oblate spheroids, crescents, disks, wheels, and animal or bird heads. They are often engraved or inlayed with various designs and occasionally gilt and mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waster
In martial arts, a waster is a practice weapon, usually a sword, and usually made out of wood, though nylon (plastic) wasters are also available. Nylon being much safer than wood, due to it having an adequate amount of flex for thrusts to be generally safe, unlike wooden wasters. Even a steel feder has more flex than most wooden wasters. The use of wood or nylon instead of metal provides an economic option for initial weapons training and sparring, at some loss of genuine experience. A weighted waster may be used for a sort of strength training, theoretically making the movements of using an actual sword comparatively easier and quicker, though modern sports science shows that an athlete would most optimally train with an implement which is closest to the same weight, balance, and shape of the tool they will be using . Wasters as wooden practice weapons have been found in a variety of cultures over a number of centuries, including ancient China, Ireland, Iran, Scotland, Rome, Eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bokken
A ''bokken'' (, , "wood", and ''ken'', "sword") (or a ''bokutō'' ) is a Japanese wooden sword used for training in kenjutsu. It is usually the size and shape of a ''katana'', but is sometimes shaped like other swords, such as the ''wakizashi'' and ''tantō''. Some ornamental ''bokken'' are decorated with mother-of-pearl work and elaborate carvings. Sometimes it is spelled "boken" in English. ''Bokken'' are traditionally composed of red oak or white oak, although any hardwood can be used. In comparison, practice swords made of flexible, soft wood such as bamboo are referred to as ''shinai''. History It is hard to determine precisely when the first ''bokken'' appeared due to secrecy in ancient martial arts training and loose record-keeping. While various mock weapons were surely used during the earlier periods of Japanese history, usage of ''bokken'' in their modern form first emerged during the Muromachi Period (1336–1600) for the training of samurai warriors in the var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drop (liquid)
A drop or droplet is a small column of liquid, bounded completely or almost completely by free surfaces. A drop may form when liquid accumulates at the lower end of a tube or other surface boundary, producing a hanging drop called a pendant drop. Drops may also be formed by the condensation of a vapor or by atomizer nozzle, atomization of a larger mass of solid. Water vapor will condense into droplets depending on the temperature. The temperature at which droplets form is called the dew point. Surface tension Liquid forms drops because it exhibits surface tension. A simple way to form a drop is to allow liquid to flow slowly from the lower end of a vertical tube of small diameter. The surface tension of the liquid causes the liquid to hang from the tube, forming a pendant. When the drop exceeds a certain size it is no longer stable and detaches itself. The falling liquid is also a drop held together by surface tension. Viscosity and pitch drop experiments Some substa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arming Sword
In the European High Middle Ages, the typical sword (sometimes academically categorized as the knightly sword, arming sword, or in full, knightly arming sword) was a straight, double-edged weapon with a single-handed, cruciform (i.e., cross-shaped) hilt and a blade length of about . This type is frequently depicted in period artwork, and numerous examples have been preserved archaeologically. The high medieval sword of the Romanesque period (10th to 13th centuries) developed gradually from the Viking sword of the 9th century. In the Late Medieval period (14th and 15th centuries), late forms of these swords continued to be used, but often as a sidearm, at that point called "arming swords" and contrasting with the two-handed, heavier longswords. Though the majority of late-medieval arming swords kept their blade properties from previous centuries, there are also surviving specimens from the 15th century that took the form of a late-medieval estoc, specialised for use against more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyhedrons
In geometry, a polyhedron (plural polyhedra or polyhedrons; ) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices. A convex polyhedron is the convex hull of finitely many points, not all on the same plane. Cubes and pyramids are examples of convex polyhedra. A polyhedron is a 3-dimensional example of a polytope, a more general concept in any number of dimensions. Definition Convex polyhedra are well-defined, with several equivalent standard definitions. However, the formal mathematical definition of polyhedra that are not required to be convex has been problematic. Many definitions of "polyhedron" have been given within particular contexts,. some more rigorous than others, and there is not universal agreement over which of these to choose. Some of these definitions exclude shapes that have often been counted as polyhedra (such as the self-crossing polyhedra) or include shapes that are often not considered as valid polyhed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spheres
The Synchronized Position Hold Engage and Reorient Experimental Satellite (SPHERES) are a series of miniaturized satellites developed by MIT's Space Systems Laboratory for NASA and US Military, to be used as a low-risk, extensible test bed for the development of metrology, formation flight, rendezvous, docking and autonomy algorithms that are critical for future space missions that use distributed spacecraft architecture, such as Terrestrial Planet Finder and Orbital Express. Each SPHERES satellite is an 18-sided polyhedron, with a mass of about 4.1 kg and a diameter of about 21 cm. They can be used in the International Space Station as well as in ground-based laboratories, but not in the vacuum of space. The battery-powered, self-contained units can operate semi-autonomously, using CO2-based cold-gas thrusters for movement and a series of ultrasonic beacons for orientation. The satellites can communicate with each other and with a control station wirelessly. The built-i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pommel (sword)
The hilt (rarely called a haft or shaft) of a knife, dagger, sword, or bayonet is its handle, consisting of a guard, grip and pommel. The guard may contain a crossguard or quillons. A tassel or sword knot may be attached to the guard or pommel. Pommel The pommel (Anglo-Norman "little apple") is an enlarged fitting at the top of the handle. They were originally developed to prevent the sword from slipping from the hand. From around the 11th century in Europe they became heavy enough to be a counterweight to the blade. This gave the sword a point of balance not too far from the hilt allowing a more fluid fighting style. Depending on sword design and swordsmanship style, the pommel may also be used to strike the opponent (e.g., using the Mordhau technique). Pommels have appeared in a wide variety of shapes, including oblate spheroids, crescents, disks, wheels, and animal or bird heads. They are often engraved or inlayed with various designs and occasionally gilt and mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical European Martial Arts
Historical European martial arts (HEMA) are martial arts of European origin, particularly using arts formerly practised, but having since died out or evolved into very different forms. While there is limited surviving documentation of the martial arts of classical antiquity (such as Greek wrestling or gladiatorial combat), surviving dedicated technical treatises or martial arts manuals date to the Late Middle Ages and the early modern period. For this reason, the focus of HEMA is ''de facto'' on the period of the half-millennium of ca. 1300 to 1800, with a German and an Italian school flowering in the Late Middle Ages and the Renaissance (14th to 16th centuries), followed by Spanish, Portuguese, French, English, and Scottish schools of fencing in the modern period (17th and 18th centuries). Arts of the 19th century such as classical fencing, and even early hybrid styles such as Bartitsu, may also be included in the term HEMA in a wider sense, as may traditional or folkloristi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical European Martial Arts Revival
History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts, art and material artifacts, and ecological markers. History is not complete and still has debatable mysteries. History is also an academic discipline which uses narrative to describe, examine, question, and analyze past events, and investigate their patterns of cause and effect. Historians often debate which narrative best explains an event, as well as the significance of different causes and effects. Historians also debate the nature of history as an end in itself, as well as its usefulness to give perspective on the problems of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Center Of Percussion
The center of percussion is the point on an extended massive object attached to a pivot where a perpendicular impact will produce no reactive shock at the pivot. Translational and rotational motions cancel at the pivot when an impulsive blow is struck at the center of percussion. The center of percussion is often discussed in the context of a bat, racquet, door, sword or other extended object held at one end. The same point is called the center of oscillation for the object suspended from the pivot as a pendulum, meaning that a simple pendulum with all its mass concentrated at that point will have the same period of oscillation as the compound pendulum. In sports, the center of percussion of a bat, racquet, or club is related to the so-called " sweet spot", but the latter is also related to vibrational bending of the object. Explanation Imagine a rigid beam suspended from a wire by a fixture that can slide freely along the wire at point P, as shown in the Figure. An impulsive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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