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Glowsticks
A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once. The used tube is then thrown away. Glow sticks are often used for recreation, such as for events, camping, outdoor exploration, and concerts. Glow sticks are also used for light in military and emergency services applications. Industrial uses include marine, transportation, and mining. History Bis(2,4,5-trichlorophenyl-6-carbopentoxyphenyl)oxalate, trademarked "Cyalume", was invented in 1971 by Michael M. Rauhut, of American Cyanamid, based on work by Edwin A. Chandross of Bell Labs. Other early work on chemiluminescence was carried out at the same time, by researchers under Herbert Richter at China Lake Naval Weapons Center. Several US patents for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightstick Disassembly
A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once. The used tube is then thrown away. Glow sticks are often used for recreation, such as for events, camping, outdoor exploration, and concerts. Glow sticks are also used for light in military and emergency services applications. Industrial uses include marine, transportation, and mining. History Bis(2,4,5-trichlorophenyl-6-carbopentoxyphenyl)oxalate, trademarked "Cyalume", was invented in 1971 by Michael M. Rauhut, of American Cyanamid, based on work by Edwin A. Chandross of Bell Labs. Other early work on chemiluminescence was carried out at the same time, by researchers under Herbert Richter at China Lake Naval Weapons Center. Several US patents for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glowstick
A glow stick, also known as a light stick, chem light, light wand, light rod, and rave light, is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence. The light cannot be turned off and can be used only once. The used tube is then thrown away. Glow sticks are often used for recreation, such as for events, camping, outdoor exploration, and concerts. Glow sticks are also used for light in military and emergency services applications. Industrial uses include marine, transportation, and mining. History Bis(2,4,5-trichlorophenyl-6-carbopentoxyphenyl)oxalate, trademarked "Cyalume", was invented in 1971 by Michael M. Rauhut, of American Cyanamid, based on work by Edwin A. Chandross of Bell Labs. Other early work on chemiluminescence was carried out at the same time, by researchers under Herbert Richter at China Lake Naval Weapons Center. Several US patents for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bis(2,4,5-trichlorophenyl-6-carbopentoxyphenyl)oxalate
Bis ,4,5-trichloro-6-(pentyloxycarbonyl)phenylxalate (also known as bis(2,4,5-trichloro-6-carbopentoxyphenyl) oxalate or CPPO) is a solid ester whose oxidation products are responsible for the chemiluminescence in a glowstick. It can be synthesized by reacting 2-carbopentoxy-3,5,6-trichlorophenol with oxalyl chloride. When mixed with hydrogen peroxide in an organic solvent (diethyl phthalate, ethyl acetate, etc...) in the presence of a fluorescent dye CPPO causes the emission of light, as per the following scheme involving 1,2-dioxetanedione (note that many side-groups of the aromatic rings are not shown.): : The reaction rate is pH dependent, and slightly alkaline conditions achieved by adding a weak base, e.g. sodium salicylate, will produce brighter light. Developed by American Cyanamid in the 1960s, the formulation containing CPPO, a fluorescer, and a glass capsule containing hydrogen peroxide and a base catalyst, all in dialkyl phthalate Phthalates (, ), or phthalat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poi (performance Art)
Poi is a performing art and also the name of the equipment used for its performance. As a skill toy, poi is an object or theatrical prop used for dexterity play or an object manipulation. As a performance art, poi involves swinging tethered weights through a variety of rhythmical and geometric patterns. Poi artists may also sing or dance while swinging their poi. Poi can be made from various materials with different handles, weights, and effects (such as fire). Poi originated with the Māori people of New Zealand, where it is still practised today. Poi has also gained a following in many other countries. The expansion of poi culture has led to a significant evolution of the styles practised, the tools used, and the definition of the word "poi." Māori culture In the Māori language, ''poi'' can mean the physical objects used by the dancers, the choreography itself, or the accompanying music. In Māori culture, poi performance is usually practised by women. Some legends ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Close-quarters Combat
Close-quarters combat (CQC) or close-quarters battle (CQB) is a tactical situation that involves a physical fight with firearms involved between multiple combatants at short range. It can occur between military units, police/corrections officers and criminal elements, and in other similar situations. In warfare, it usually consists of units or teams of varying size engaging the target or attacking personnel with personal weapons within a distance of up to 100 meters (110 yards), from proximity hand-to-hand combat to close-quarter target negotiation with usually automatic weapons. In the typical close combat scenario, the attackers try a very fast, violent takeover of a vehicle or structure controlled by the defenders, who usually have no easy method to withdraw. Because attacking and defending personnel, hostages/civilians, and friendly personnel can be closely intermingled, close-quarters combat demands a rapid assault and a precise implementation of lethal force. The operat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Police Tactical Unit
A police tactical unit (PTU) is a specialized police unit trained to handle situations that are beyond the capabilities of ordinary law enforcement units because of the level of violence (or risk of violence) involved. A police tactical unit's tasks may include executing search warrants and arrest warrants for dangerous suspects, arresting or neutralizing dangerous armed suspects, and intervening in high risk situations such as shootouts, hostage takings, and terrorist incidents. Definition Police tactical units are dedicated units composed of personnel selected and trained in tactical skillsets to carry out the responsibilities of the unit, including use of force, arrest procedures, close-quarters combat, door breaching, and counterterrorism. A PTU is equipped with specialized police and military-type equipment. PTU personnel may also be trained in crisis negotiation skills. A PTU can be part of either a police force under the authority of civilian officials; or a gendarme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Survival Kit
A survival kit is a package of basic tools and supplies prepared as an aid to survival in an emergency. Civil and military aircraft, lifeboats, and spacecraft are equipped with survival kits. Survival kits, in a variety of sizes, contain supplies and tools to provide a survivor with basic shelter against the elements, help them to keep warm, meet basic health and first aid needs, provide food and water, signal to rescuers, and assist in finding the way back to help. Supplies in a survival kit normally include a knife (often a Swiss army knife or a multi-tool), matches, tinder, first aid kit, bandana, fish hooks, sewing kit, and a flashlight. Civilians such as forestry workers, surveyors, or bush pilots, who work in remote locations or in regions with extreme climate conditions, may also be equipped with survival kits. Disaster supplies are also kept on hand by those who live in areas prone to earthquakes or other natural disasters. For the average citizen to practice dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitewater, Wisconsin
Whitewater is a city located in Walworth and Jefferson counties in the U.S. state of Wisconsin. Located near the southern portion of the Kettle Moraine State Forest, Whitewater is the home of the University of Wisconsin–Whitewater. As of the 2020 census, the city's population was 14,889. History Whitewater was founded at the confluence of Whitewater Creek and Spring Brook, and named for the white sand in their beds.History of Whitewater A was built on Whitewater creek, the resulting pond now called Cravath Lake. The town grew quickly when the first |
University Of Wisconsin–Whitewater
The University of Wisconsin–Whitewater (UW–Whitewater) is a public university in Whitewater, Wisconsin. It is part of the University of Wisconsin System. Student enrollment in the 2014–2015 academic year was more than 12,000. The university offers 47 undergraduate majors and 13 graduate programs. Approximately 1,400 faculty and staff are employed by the university, and the student body consists of individuals from about 40 states and 30 countries. History On April 21, 1868, the school was named Whitewater Normal School and graduated its first class of teachers in June, 1870. Albert Salisbury, writing in 1893, remarked: "The young men and women who gathered into this school in those early years found here a new and stimulating atmosphere. The spirit of earnestness–almost a severe earnestness,–pervaded the place; and the high ideals of its administration were contagious in a remarkable degree." Salisbury wrote of a unique tradition of the school known as "Students' Day. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinness Book Of Records
''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world records both of human achievements and the extremes of the natural world. The brainchild of Sir Hugh Beaver, the book was co-founded by twin brothers Norris and Ross McWhirter in Fleet Street, London, in August 1955. The first edition topped the best-seller list in the United Kingdom by Christmas 1955. The following year the book was launched internationally, and as of the 2022 edition, it is now in its 67th year of publication, published in 100 countries and 23 languages, and maintains over 53,000 records in its database. The international franchise has extended beyond print to include television series and museums. The popularity of the franchise has resulted in ''Guinness World Records'' becoming the primary international authorit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balloon-carried Light Effect
A balloon-carried light effect is a special effect carried by a balloon, which can be fixed with a rope to the ground or free-flying. They are commonly misidentified as "Unidentified Flying Objects" by members of public. Uses Balloon-carried light effects can be used without safety concerns at events with a lot of people, because unlike fireworks they do not require the use of flammable substances. The brightness is much lower, when non-dangerous light sources such as lightsticks or battery-powered lamps are used. Balloon-carried light effects cannot replace fireworks, but supplement them, because of their long lighting time (if lightsticks or battery powered lamps are used) and because of their inherent safety. To realise a balloon-carried light effect, one or more balloons are used, capable of carrying a lightstick or a small battery powered lamp. Further it is possible to insert one or two small lightsticks into a transparent balloon. It is also possible for larger balloo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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