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Surfboard Leash
A leg rope or surfboard leash is a urethane cord attached to the deck of a surfboard, down near the tail. It prevents the surfboard from being swept away by waves and stops runaway surfboards from hitting other surfers and swimmers. Modern leashes consist of a urethane cord where one end has a band with a velcro strap attached to the surfer's trailing foot, and the opposite has a velcro strap attached to the tail end of the surfboard. Should the surfer fall while riding a wave, the surfboard will not be swept away, thus allowing the surfer to quickly recover his surfboard and return to the take-off zone. Background The leash was invented in the 1970s amidst controversy that it was a dangerous accessory. Prior to leashes introduction in 1971, surfers who fell off their boards had to swim to retrieve them with runaway boards being an inconvenience to the surfer and a danger to other surfers. Initially, people expressed concern that if a surfer fell while riding a wave and wearin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyurethane
Polyurethane (; often abbreviated PUR and PU) refers to a class of polymers composed of organic chemistry, organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from a wide range of starting materials. This chemical variety produces polyurethanes with different chemical structures leading to many List of polyurethane applications, different applications. These include rigid and flexible foams, varnishes and coatings, adhesives, Potting (electronics), electrical potting compounds, and fibers such as spandex and Polyurethane laminate, PUL. Foams are the largest application accounting for 67% of all polyurethane produced in 2016. A polyurethane is typically produced by reacting an isocyanate with a polyol. Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as Copolymer#Alternating copolymers, alternating copolymers. Both the isocy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malibu, California
Malibu ( ; es, Malibú; Chumash: ) is a beach city in the Santa Monica Mountains region of Los Angeles County, California, situated about west of Downtown Los Angeles. It is known for its Mediterranean climate and its strip of the Malibu coast, incorporated in 1991 into the City of Malibu. The exclusive Malibu Colony has been historically home to Hollywood celebrities. People in the entertainment industry and other affluent residents live throughout the city, yet many residents are middle class. Most Malibu residents live from a half-mile (0.8 km) to within a few hundred yards of Pacific Coast Highway ( State Route 1), which traverses the city, with some residents living up to one mile (1.6 km) away from the beach up narrow canyons. As of the 2020 census, the city population was 10,654. Nicknamed "the 'Bu" by surfers and locals, beaches along the Malibu coast include: Topanga Beach, Big Rock Beach, Las Flores Beach, La Costa Beach, Surfrider Beach, Dan Blocker Beach, Mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shortboard
A surfboard is a narrow plank used in surfing. Surfboards are relatively light, but are strong enough to support an individual standing on them while riding an ocean wave. They were invented in ancient Hawaii, where they were known as ''papa he'e nalu'' in the Hawaiian language, and were usually made of wood from local trees, such as koa. They were often over in length and extremely heavy. Major advances over the years include the addition of one or more fins (skegs) on the bottom rear of the board to improve directional stability, and numerous improvements in materials and shape. Modern surfboards are made of polyurethane or polystyrene foam covered with layers of fiberglass cloth, and polyester or epoxy resin. The result is a light and strong surfboard that is buoyant and maneuverable. Recent developments in surfboard technology have included the use of carbon fiber and kevlar composites, as well as experimentation in biodegradable and ecologically friendly resins made from o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swivel
A swivel is a connection that allows the connected object, such as a gun, chair, swivel caster, or an anchor rode to rotate horizontally or vertically. Swivel designs A common design for a swivel is a cylindrical rod that can turn freely within a support structure. The rod is usually prevented from slipping out by a nut, washer or thickening of the rod. The device can be attached to the ends of the rod or the center. Another common design is a sphere that is able to rotate within a support structure. The device is attached to the sphere. A third design is a hollow cylindrical rod that has a rod that is slightly smaller than its inside diameter inside of it. They are prevented from coming apart by flanges. The device may be attached to either end. A swivel joint for a pipe is often a threaded connection in between which at least one of the pipes is curved, often at an angle of 45 or 90 degrees. The connection is tightened enough to be water- or air-tight and then tightened f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuff
A cuff is a layer of fabric at the lower edge of the sleeve of a garment (shirt, coat, jacket, etc.) at the wrist, or at the ankle end of a trouser leg. The function of turned-back cuffs is to protect the cloth of the garment from fraying, and, when frayed, to allow the cuffs to be readily repaired or replaced, without changing the garment. Cuffs are made by turning back (folding) the material, or a separate band of material can be sewn on, or worn separately, attached either by buttons or studs. A cuff may display an ornamental border or have lace or some other trimming. In US usage, the word ''trouser cuffs'' refers to the folded, finished bottoms of the legs of a pair of trousers. In the UK, while this usage is now sometimes followed, the traditional term for the turned up trouser hem is 'turnup'. History Between the 15th and 18th centuries, rich men often wore sleeve cuffs ornamented with fine lace. Still today, Catholic clergy have the cuffs of their choir dress ornamen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modern Architecture
Modern architecture, or modernist architecture, was an architectural movement or architectural style based upon new and innovative technologies of construction, particularly the use of glass, steel, and reinforced concrete; the idea that form should follow function ( functionalism); an embrace of minimalism; and a rejection of ornament. It emerged in the first half of the 20th century and became dominant after World War II until the 1980s, when it was gradually replaced as the principal style for institutional and corporate buildings by postmodern architecture. Origins File:Crystal Palace.PNG, The Crystal Palace (1851) was one of the first buildings to have cast plate glass windows supported by a cast-iron frame File:Maison François Coignet 2.jpg, The first house built of reinforced concrete, designed by François Coignet (1853) in Saint-Denis near Paris File:Home Insurance Building.JPG, The Home Insurance Building in Chicago, by William Le Baron Jenney (1884) File:Const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bracelet Néoprène D'un Leash
A bracelet is an article of jewellery that is worn around the wrist. Bracelets may serve different uses, such as being worn as an ornament. When worn as ornaments, bracelets may have a supportive function to hold other items of decoration, such as charms. Medical and identity information are marked on some bracelets, such as allergy bracelets, hospital patient-identification tags, and bracelet tags for newborn babies. Bracelets may be worn to signify a certain phenomenon, such as breast cancer awareness, or for religious/cultural purposes. If a bracelet is a single, inflexible loop, it is often called a ''bangle''. When it is worn around the ankle it is called an ''ankle bracelet'' or ''anklet''. A ''boot bracelet'' is used to decorate boots. Bracelets can be manufactured from metal, leather, cloth, plastic, bead or other materials, and jewelry bracelets sometimes contain jewels, rocks, wood, shells, crystals, metal, or plastic hoops, pearls and many more materials. Origin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Design Award
The Australian Good Design Awards, formerly known as the Australian International Design Awards and as the Australian Design Awards, is an Australian awards program operated by Good Design Australia. The awards program was originally established in 1958 by the Industrial Design Council of Australia (IDCA), and recognises achievements in industrial design. In 2007 the Australian Design Awards expanded its entry criteria to include all professionally designed products on the Australian market, including products designed outside of Australia as well as those designed within the country. From 2007, the Australian Design Awards was renamed as the Australian International Design Awards to emphasise the inclusion of products not designed in Australia. Projects recognised with an Australian Good Design Award demonstrate excellence in professional design and highlight the impact a design-led approach has on business success and social and environmental outcomes. Each entry is evaluated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copyright
A copyright is a type of intellectual property that gives its owner the exclusive right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, educational, or musical form. Copyright is intended to protect the original expression of an idea in the form of a creative work, but not the idea itself. A copyright is subject to limitations based on public interest considerations, such as the fair use doctrine in the United States. Some jurisdictions require "fixing" copyrighted works in a tangible form. It is often shared among multiple authors, each of whom holds a set of rights to use or license the work, and who are commonly referred to as rights holders. These rights frequently include reproduction, control over derivative works, distribution, public performance, and moral rights such as attribution. Copyrights can be granted by public law and are in that case considered "territorial righ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raglan, New Zealand
Raglan is a small beachside town located 48 km west of Hamilton, New Zealand on State Highway 23. It is known for its surfing, and volcanic black sand beaches. History The Ngāti Māhanga iwi occupied the area around Raglan in the late 18th century. There are at least 81 archaeological sites in the area, mainly near the coast. Limited radiocarbon dating puts the earliest sites at about 1400AD. The Māori people named the site ("the long pursuit"). One tradition says that Tainui priest, Rakataura, crossed Whāingaroa on his way to Kāwhia. Another says it was among the places the early Te Arawa explorer, Kahumatamomoe, with his nephew Īhenga, visited on their expedition from Maketū. The first Europeans to settle in the area, the Rev James and Mary Wallis, Wesleyan missionaries, were embraced and welcomed by local Māori in 1835. European settlement, including large scale conversion of land to pasture, began in the mid-1850s after a large sale of land by Chief Wirem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bungee Cord
Bungee cords equipped with metal hooks A bungee cord (sometimes spelled bungle; also known as a shock cord) is an elastic cord composed of one or more elastic strands forming a core, usually covered in a woven cotton or polypropylene sheath. The sheath does not materially extend elastically, but it is braided with its strands spiralling around the core so that a longitudinal pull causes it to squeeze the core, transmitting the core's elastic compression to the longitudinal extension of the sheath and cord. Specialized bungees, such as some used in bungee jumping, may be made entirely of elastic strands. Uses upA child on a bungee cord device in Moscow, Russia Bungee cords have been used to provide a lightweight suspension for aircraft undercarriages from before World War I, and are still used on many small homebuilt aircraft where weight remains critical. Bungee cords were also used in parachuting to assist in opening the old-style parachute container after the ripcord wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deformation (engineering)
In engineering, deformation refers to the change in size or shape of an object. ''Displacements'' are the ''absolute'' change in position of a point on the object. Deflection is the relative change in external displacements on an object. Strain is the ''relative'' internal change in shape of an infinitesimally small cube of material and can be expressed as a non-dimensional change in length or angle of distortion of the cube. Strains are related to the forces acting on the cube, which are known as stress, by a stress-strain curve. The relationship between stress and strain is generally linear and reversible up until the yield point and the deformation is elastic. The linear relationship for a material is known as Young's modulus. Above the yield point, some degree of permanent distortion remains after unloading and is termed plastic deformation. The determination of the stress and strain throughout a solid object is given by the field of strength of materials and for a structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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