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Scotchlite
Retroreflective sheeting is flexible retroreflective material primarily used to increase the nighttime conspicuity of traffic signs, high-visibility clothing, and other items so they are safely and effectively visible in the light of an approaching driver's headlamps. They are also used as a material to increase the scanning range of barcodes in factory settings. The sheeting consists of retroreflective glass beads, microprisms, or encapsulated lenses sealed onto a fabric or plastic substrate. Many different colors and degrees of reflection intensity are provided by numerous manufacturers for various applications. As with any retroreflector, sheeting glows brightly when there is a small angle between the observer's eye and the light source directed toward the sheeting but appears nonreflective when viewed from other directions. Applications Retroreflective sheeting is widely used in a variety of applications today, after early widespread use on road signs in the 1960s. High- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightsaber
A lightsaber is a fictional energy sword featured throughout ''Star Wars''. A typical lightsaber is shown as a luminous laser sword about in length emitted from a metal hilt around in length. First introduced in the original ''Star Wars'' film, it has since appeared in all 12 theatrical ''Star Wars'' films, with at least one lightsaber duel occurring in each installment of the " Skywalker saga". The lightsaber's distinct appearance was created using rotoscoping for the original films, and with digital effects for the prequel and sequel trilogies. In the ''Star Wars'' universe, the lightsaber is the signature weapon of the light-side-wielding Jedi Order and the dark-side-wielding Sith Order. However, the lightsaber can also be wielded by non- Force-sensitive characters as an ordinary weapon or tool. The Jedi use different colored lightsabers. The most common lightsaber colors are blue and green, but other colors also exist, those being purple, white, black, and ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Front Projection Effect
A front projection effect is an in-camera visual effects process in film production for combining foreground performance with pre-filmed background footage. In contrast to rear projection, which projects footage onto a screen from behind the performers, front projection projects the pre-filmed material over the performers and onto a highly reflective background surface. Description In contrast to rear projection, in front projection the background image is projected onto both the performer and a highly reflective background screen, with the result that the projected image is bounced off the screen and into the lens of a camera. This is achieved by having a screen made of a retroreflective material such as Scotchlite, a product of the 3M company that is also used to make screens for movie theaters. Such material is made from millions of glass beads affixed to the surface of the cloth. These glass beads reflect light back only in the direction from which it came, far more effi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASTM
ASTM International, formerly known as American Society for Testing and Materials, is a standards organization that develops and publishes voluntary consensus technical international standards for a wide range of materials, products, systems and services. Some 12,575 apply globally. The headquarters is in West Conshohocken, Pennsylvania, about northwest of Philadelphia. It was founded in 1902 as the American Section of the International Association for Testing Materials. In addition to its traditional standards work, ASTM operates several global initiatives advancing additive manufacturing, advanced manufacturing, and emerging technologies, including the Additive Manufacturing Center of Excellence (AM CoE), the acquisition oWohlers Associatesfor market intelligence and advisory services, and the NIST-funded Standardization Center of Excellence (SCOE). History In 1898, a group of scientists and engineers, led by chemist, industry leader, and proponent of standardization Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyperloop
Hyperloop is a proposed high-speed transportation system for both passengers and freight. The concept was published by entrepreneur Elon Musk in a 2013 white paper, where the hyperloop was described as a transportation system using capsules supported by an air bearing, air-bearing surface within a low-pressure tube. Hyperloop systems have three essential elements: tubes, pods, and terminals. The tube is a large, sealed Vacuum#Vacuum-driven machines, low-pressure system (typically a long tunnel). The pod is a coach at atmospheric pressure that experiences low Drag (physics), air resistance or friction inside the tube using Maglev, magnetic propulsion (in the initial design, augmented by a ducted fan). The terminal handles pod arrivals and departures. The hyperloop, in the form proposed by Musk, differs from other Vactrain, vactrains by relying on residual air pressure inside the tube to provide lift from Aerofoil, aerofoils and propulsion by fans; however, many subsequent variants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, air navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's Position (geometry), position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and Relative direction, direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autonomous Vehicles
Vehicular automation is using technology to assist or replace the operator of a vehicle such as a car, truck, aircraft, rocket, military vehicle, or boat. Assisted vehicles are ''semi-autonomous'', whereas vehicles that can travel without a human operator are ''autonomous''. The degree of autonomy may be subject to various constraints such as conditions. Autonomy is enabled by advanced driver-assistance systems (ADAS) of varying capacity. Related technology includes advanced software, maps, vehicle changes, and outside vehicle support. Autonomy presents varying issues for road, air, and marine travel. Roads present the most significant complexity given the unpredictability of the driving environment, including diverse road designs, driving conditions, traffic, obstacles, and geographical/cultural differences. Autonomy implies that the vehicle is responsible for all perception, monitoring, and control functions. SAE autonomy levels The Society of Automotive Engineers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Light is a type of electromagnetic radiation, and other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the classical electromagnetic description of light, however complete electromagnetic descriptions of light are often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star Wars (film)
''Star Wars'' (later retitled ''Star Wars: Episode IV – A New Hope'') is a 1977 American Epic film, epic space opera film written and directed by George Lucas, produced by Lucasfilm Ltd. and released by Twentieth Century-Fox. It is the first film in the ''Star Wars'' franchise and the fourth chronological chapter of the "Skywalker Saga". Set in Universe of Star Wars, a fictional galaxy under the rule of the tyrannical Galactic Empire (Star Wars), Galactic Empire, the film follows a group of freedom fighters known as the Rebel Alliance, who aim to destroy the Empire's ultimate weapon, the Death Star. When the rebel leader Princess Leia is captured by the Empire, Luke Skywalker acquires stolen architectural plans of the Death Star and sets out to rescue her while learning the ways of a metaphysical power known as "the Force" from the Jedi Master Obi-Wan Kenobi. The cast includes Mark Hamill, Harrison Ford, Carrie Fisher, Peter Cushing, Alec Guinness, Anthony Daniels, Kenny Bak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superman (1978 Film)
''Superman'' (also marketed as ''Superman: The Movie'') is a 1978 superhero film based on DC Comics featuring the eponymous character, played by Christopher Reeve. It is the first of four installments in the ''Superman'' film series starring Reeve as Superman. The film was directed by Richard Donner based on a screenplay by Mario Puzo, David Newman, Leslie Newman, and Robert Benton. The film features an ensemble cast including Marlon Brando, Gene Hackman, Jeff East, Margot Kidder, Glenn Ford, Phyllis Thaxter, Jackie Cooper, Trevor Howard, Marc McClure, Terence Stamp, Valerie Perrine, Ned Beatty, Jack O'Halloran, Maria Schell, and Sarah Douglas. It depicts the origin of Superman, including his infancy as Kal-El of Krypton, son of Jor-El (Brando), and his youthful years in the rural town of Smallville. Disguised as reporter Clark Kent, he adopts a mild-mannered disposition in Metropolis and develops a romance with Lois Lane (Kidder) while battling the villainous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Where Eagles Dare
''Where Eagles Dare'' is a 1968 action adventure war film directed by Brian G. Hutton and starring Richard Burton, Clint Eastwood and Mary Ure. Set during World War II, it follows a Special Operations Executive team charged with saving a captured American General from the fictional ''Schloß Adler'' fortress, except the mission turns out not to be as it seems. It was filmed in Panavision using the Metrocolor process, and was distributed by Metro-Goldwyn-Mayer. Alistair MacLean wrote the screenplay, his first, at the same time that he wrote the novel of the same name. Both became commercial successes. The film involved some of the top filmmakers of the day and was shot on location in Austria. Hollywood stuntman Yakima Canutt was the second unit director and shot most of the action scenes; British stuntman Alf Joint doubled for Burton in many sequences, including the fight on top of the cable car; award-winning conductor and composer Ron Goodwin wrote the film score; a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silent Running
''Silent Running'' is a 1972 American ecological-themed science fiction film. It is the directorial debut of Douglas Trumbull, and stars Bruce Dern, Cliff Potts, Ron Rifkin, and Jesse Vint. Plot In the future, all forests on Earth have become extinct from careless environmental exploitation. As many specimens as possible have been preserved in a series of enormous greenhouse-like geodesic domes serving as closed ecological systems attached to large cargo spaceships, forming part of a fleet of eight "American Airlines Space Freighters", stationed outside the orbit of Saturn. Freeman Lowell, one of four crewmen, is the resident botanist and ecologist on one of these ships, the ''Valley Forge.'' He carefully maintains a variety of plants for their eventual return to Earth and the reforestation of the planet. He spends most of his time in the domes, cultivating the crops and attending to the animal life. The crew of each ship receives orders to jettison and destroy their d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
